The major selling point for me here is how fast this app is at work. Its speedier than all other Dropbox-based notes apps Ive used, and its also quicker than Simplenote on my 3GS.
I do think the icon and the bottom bar of the notes view could use a bit of work, though. The icon feels too cartoony for my tastes (despite the playful app name) and the notes view bottom bar could look a little more professional (Elements from Second Gear has some fantastic buttons).
However, if youre just after functionality, then Notesy will not disappoint. Oh, and did I mention its really fast?
Ragart about Notesy for Dropbox