its a really streamlined additive engine with a bunch of subtractive features tagged on. You can create great patches of all sorts really quickly with this and its a very low CPU hit in FL studio.
This is one of Image-Line's better FL stock plugins. I use it a lot for plucks, but I've made leads in it before. The way the synth runs filtering, pluck, and onboard effects is pretty sweet, but if you need a large range of sonic flexibility, you may want to look elsewhere. As far as phat leads, I'd say Sylenth1 is better, but for being a stock plugin, this is actually fairly nice.
On my old PC I did try FL Studio. I mainly disliked it, which is why I stayed with Ableton, however this synth certainly stood out. I loved the sound it had. I really want it to come to Mac so I can use it again.