I have a Lamptron FC5 v2, and on the whole am happy with it. It's very powerful (30w on each of its 4 channels) so will be able to handle everything I can possibly throw at it, which was a consideration for me as I hope to add some more fans to the case and eventually get everything underwater. The changeable colour is a nice touch, and personally I love the brushed aluminium look it has - goes well with my case and K70 keyboard.
I made a post a little while ago about my v2's oddities, but sadly it went unanswered. Basically, the voltage delivered to the fans fluctuates quite a bit and it's not easy to dial in a specific RPM. However, as I use the temperature readout and am happy to have fans at "about 1000rpm" or "about 1500rpm", for instance, neither issue really bothers me. My fans are virtually silent below 1000rpm, pretty loud at full speed (~1700rpm) and have a sweet spot that combines good cooling and reasonable volume at around 1300rpm. I've gotten used to going between these 3 speeds now and so the controller is really working for me.
There are 4 knobs on the unit, so if you are after a flush look this might not be for you. Personally, though, I prefer being able to twiddle the knobs (rather than fiddle with software) especially if I am mid-game etc.