Compressore, super booster, and super synth. Haven't had alot of time with them but here's what I got so far. Super booster is sweet! Bassically a volume boost, and the vpf and vle filters. The volume boost can be applied to your straight signal, or to a filtered signal. It's nice to take a solo and be heard! The vpf is nice! No more eq'ing the amp for slap stuff. It also works as an active D.I. Buy I haven't put it up against the sansamp yet.... The compressor is really nice as well. It's quiet and the tube warms up the sound just a little. Its nice for just evening things out. The manuals on all of these were kind of week though... Hardly any cool presets in them. The synth is definately the most exciting but also has a learning curve. You can get the software online and customize your presets. At first I felt like the presets sucked, and the software was kinda hard to use. I felt like I couldn't dial the sound in my head through the software... But I eventually got the hang of it, then realized there's another area with controls for even more fine tuning. I'm thinking this thing can do some pretty cool stuff if you put some time into it! If you have any questions I'll try to answer them as best as I can!