I like this synth a lot. I use dexed fairly often too, but Oxe FM Synth is well worth having, it's pianos, EPs and chimes have a really sweet character. I haven't figured out how to edit my own patches yet, I have to rely on lots of twiddleing and luck, but this is the same for all the FM synths I have, I really should watch a few tutorials.
The GUI is a bit smaller than I'd prefer, and it feels cluttered, but some of the alternate skins address that.
Overall I consider this a must have vst, and I'm quite picky.
Thanks to Oxe Software for making this free and 64-bit.