diff --git a/options.go b/options.go
index 44f9e78..a3c8f23 100644
--- a/options.go
+++ b/options.go
@@ -24,10 +24,10 @@ func GetAllReplicaOptions(o *document.DocumentGetAllReplicaOptions) *gocb.GetAll
 // GetOptions
 func GetOptions(o *document.DocumentGetOptions) *gocb.GetOptions {
 	if o == nil {
-		return &gocb.GetOptions{Transcoder: gocb.NewRawJSONTranscoder()}
+		return &gocb.GetOptions{Transcoder: gocb.NewRawStringTranscoder()}
 	}
 	return &gocb.GetOptions{
-		Transcoder: gocb.NewRawJSONTranscoder(),
+		Transcoder: gocb.NewRawStringTranscoder(),
 		WithExpiry: o.WithExpiry,
 		Project:    o.Project,
 		// ...
@@ -67,7 +67,7 @@ func GetAnyReplicaOptions(o *document.DocumentGetAnyReplicaOptions) *gocb.GetAny
 // InsertOptions
 func InsertOptions(o *document.DocumentInsertOptions) *gocb.InsertOptions {
 	if o == nil {
-		return &gocb.InsertOptions{Transcoder: gocb.NewRawJSONTranscoder()}
+		return &gocb.InsertOptions{Transcoder: gocb.NewRawStringTranscoder()}
 	}
 	return &gocb.InsertOptions{
 		Timeout:    time.Duration(*o.TimeoutNs),
@@ -92,6 +92,7 @@ func ReplaceOptions(o *document.DocumentReplaceOptions) *gocb.ReplaceOptions {
 	}
 	return &gocb.ReplaceOptions{
 		Timeout: time.Duration(*o.TimeoutNs),
+		Transcoder: gocb.NewRawStringTranscoder(),
 	}
 }
 
@@ -118,7 +119,7 @@ func UnlockOptions(o *document.DocumentUnlockOptions) *gocb.UnlockOptions {
 // UpsertOptions
 func UpsertOptions(o *document.DocumentUpsertOptions) *gocb.UpsertOptions {
 	if o == nil {
-		return &gocb.UpsertOptions{Transcoder: gocb.NewRawJSONTranscoder()}
+		return &gocb.UpsertOptions{Transcoder: gocb.NewRawStringTranscoder()}
 	}
 	return &gocb.UpsertOptions{}
 }
diff --git a/provider.go b/provider.go
index 46b86fe..0bafe0a 100644
--- a/provider.go
+++ b/provider.go
@@ -141,7 +141,11 @@ func (h *Handler) Insert(ctx context.Context, id string, doc *types.Document, op
 	result, err := collection.Insert(id, docToInsert, InsertOptions(options))
 	if err != nil {
 		h.Logger.Error("Error inserting document", "error", err)
-		return Err[types.MutationMetadata](*types.NewDocumentErrorInvalidValue()), err
+		if errors.Is(err, gocb.ErrDocumentExists) {
+			return Err[types.MutationMetadata](*types.NewDocumentErrorAlreadyExists()), nil
+		} else {
+			return Err[types.MutationMetadata](*types.NewDocumentErrorInvalidValue()), nil
+		}
 	}
 	return Ok(MutationMetadata(result)), nil
 }
@@ -168,7 +172,14 @@ func (h *Handler) Replace(ctx context.Context, id string, doc *types.Document, o
 		h.Logger.Error("Error fetching collection from context", "error", err)
 		return nil, err
 	}
-	result, err := collection.Replace(id, doc, ReplaceOptions(options))
+
+	replacement, ok := doc.GetRaw()
+	if !ok {
+		h.Logger.Error("Error getting raw document", "doc", doc)
+		return Err[types.MutationMetadata](*types.NewDocumentErrorNotJson()), nil
+	}
+
+	result, err := collection.Replace(id, replacement, ReplaceOptions(options))
 	if err != nil {
 		h.Logger.Error("Error replacing document", "error", err)
 		return nil, err
diff --git a/results.go b/results.go
index 4dc11d7..ff88e49 100644
--- a/results.go
+++ b/results.go
@@ -35,7 +35,7 @@ func GetResult(result *gocb.GetResult) (document.DocumentGetResult, error) {
 	}
 	expiresInNs := uint64(result.ExpiryTime().Nanosecond())
 	returnDoc := document.Document{}
-	returnDoc.SetRaw(content)
+	returnDoc.SetRaw(string(content))
 	return document.DocumentGetResult{
 		Document:    &returnDoc,
 		ExpiresInNs: &expiresInNs,