I legitimately don't know why this only has four stars. Thanks to options like trill and delay, this is pretty much the ultimate ambient plugin. You can make warm pads, epic leads, and amazing FX. Also, once you get the hang of it, you can even start using it to make dubstep wobbles and growls. I'm shocked it's free; this could easily go for $30+.
Another amazing part of this is the interface. This plugin not only sounds amazing, it looks amazing. Working with this plugin is so, so much fun, and if you produce any kind of electronic music, this plugin is a must-have.
I must add that the CPU usage can actually be pretty brutal (depending on the machine of course). We just did Kairatune in the KVR One Synth Challenge and many of us were having problems. I could get about four instances on my old P4 before it was time to render to save CPU. Folks with beefy i7 machines were having fewer problems. It was an enjoyable synth to work with in the end, oh and did anyone mention... its Freee!
I really love this synth. I had it in my inventory since it's first version, but only recently really discovered it (blame goes to a buggy synth with a similar name), Now I'm using it all the time. It's a great synth to play around with and not lose any creative flow you're in. It can make unique and great sounds with only a handful of parameters. Quality wise it looks, sounds and feels like it's a lite version of a big commercial synth. It's amazing for leads.