diff --git a/src/monger/collection.clj b/src/monger/collection.clj
index 47a7b97..be600b1 100644
--- a/src/monger/collection.clj
+++ b/src/monger/collection.clj
@@ -22,6 +22,7 @@
 ;;
 
 (defn ^WriteResult insert
+  "Saves document to database"
   ([^String collection, ^DBObject document]
      (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
        (.insert ^DBCollection coll ^DBObject (to-db-object document) ^WriteConcern monger.core/*mongodb-write-concern*)))
@@ -31,9 +32,10 @@
 
 
 (defn ^WriteResult insert-batch
+  "Saves documents do database"
   ([^String collection, ^List documents]
      (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
-       (.insert ^DBCollection coll ^List (to-db-object documents) ^WriteConcern WriteConcern/NORMAL)))
+       (.insert ^DBCollection coll ^List (to-db-object documents) ^WriteConcern monger.core/*mongodb-write-concern*)))
   ([^String collection, ^List documents, ^WriteConcern concern]
      (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
        (.insert ^DBCollection coll ^List (to-db-object documents) ^WriteConcern concern))))
@@ -44,6 +46,7 @@
 (declare fields-to-db-object)
 
 (defn ^DBCursor find
+  "Queries for an object in this collection."
   ([^String collection]
      (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
        (.find coll)))
@@ -76,6 +79,7 @@
 ;;
 
 (defn ^DBObject find-one
+  "Returns a single object from this collection matching the query."
   ([^String collection, ^Map ref]
      (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
        (.findOne ^DBCollection coll ^DBObject (to-db-object ref))))
@@ -117,6 +121,7 @@
 ;; monger.collection/group
 ;;
 
+
 ;; TBD
 
 
@@ -124,6 +129,13 @@
 ;; monger.collection/count
 ;;
 (defn ^long count
+  "Returns the number of documents in this collection.
+
+  Takes optional conditions as an argument.
+
+      (monger.collection/count collection)
+
+      (monger.collection/count collection { :first_name \"Paul\" })"
   ([^String collection]
      (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
        (.count coll)))
@@ -275,4 +287,4 @@
 
 (defn- fields-to-db-object
   [^List fields]
-  (zipmap fields (repeat 1)))
\ No newline at end of file
+  (zipmap fields (repeat 1)))
diff --git a/test/monger/test/collection.clj b/test/monger/test/collection.clj
index c17b094..205a90d 100644
--- a/test/monger/test/collection.clj
+++ b/test/monger/test/collection.clj
@@ -330,6 +330,46 @@
           (is (= (:language doc) "Clojure"))))
       (is (empty? (mgcol/find collection { :language "Erlang" } [:name]))))))
 
+;; more sophisticated examples
+(deftest find-with-conditional-operators-comparison
+  (let [collection "libraries"]
+    (monger.collection/insert-batch collection [{ :language "Clojure", :name "monger"   :users 1}
+                                                { :language "Clojure", :name "langohr"  :users 5 }
+                                                { :language "Clojure", :name "incanter" :users 15 }
+                                                { :language "Scala",   :name "akka"     :users 150}])
+
+    (is (= 2 (.count (monger.collection/find collection { :users { "$gt" 10 }}))))
+    (is (= 3 (.count (monger.collection/find collection { :users { "$gte" 5 }}))))
+    (is (= 2 (.count (monger.collection/find collection { :users { "$lt" 10 }}))))
+    (is (= 2 (.count (monger.collection/find collection { :users { "$lte" 5 }}))))
+    (is (= 1 (.count (monger.collection/find collection { :users { "$gt" 10 "$lt" 150 }}))))
+
+    ))
+
+(deftest find-on-embedded-arrays
+  (let [collection "libraries"]
+    (monger.collection/insert-batch collection [{ :language "Clojure", :tags [ "functional" ] }
+                                                { :language "Scala",   :tags [ "functional" "object-oriented" ] }
+                                                { :language "Ruby",    :tags [ "object-oriented" "dynamic" ] }])
+
+    (is (= "Scala" (:language (first (monger.collection/find-maps collection { :tags { "$all" [ "functional" "object-oriented" ] } } )))))
+    (is (= 3 (.count (monger.collection/find-maps collection { :tags { "$in" [ "functional" "object-oriented" ] } } ))))))
+
+
+(deftest find-with-conditional-operators-on-embedded-documents
+  (let [collection "people"]
+    (monger.collection/insert-batch collection [{ :name "Bob", :comments [ { :text "Nice!" :rating 1 }
+                                                                           { :text "Love it" :rating 4 }
+                                                                           { :text "What?":rating -5 } ] }
+                                                { :name "Alice", :comments [ { :text "Yeah" :rating 2 }
+                                                                             { :text "Doh" :rating 1 }
+                                                                             { :text "Agreed" :rating 3 }
+                                                                             ] } ])
+
+    (is (= 1 (.count (monger.collection/find collection { :comments { "$elemMatch" { :text "Nice!" :rating { "$gte" 1 } } } }))))
+
+    (is (= 2 (.count (monger.collection/find collection { "comments.rating" 1 } ))))
+    (is (= 1 (.count (monger.collection/find collection { "comments.rating" { "$gt" 3 } }))))))
 
 ;;
 ;; update, save