I have the Giga Pro (v1) - and love it.
Use it as an intermeter, remote release, timer (for settings different to the 2 second and 10 second Canon DSLR options), etc. I've used it for macros, time-lapse, night photography, liveview, critical landscapes, etc, etc. Very flexible - and also has quite a few good settings.
I've not had any issues with my home modem / router wireless interfering with it. (And yes, I have it on- and have some neighbours with modems). Maybe only some modems are affected (or it's country-specific / Hertz specific - I live in Australia).
The 'short auto-power down' of the remote/transmitter - can be annoying, but all one needs to do is half press the shutter-release to keep it active. The receiver has a longer 'auto-power down' (if it does at all) - I think I nearly always turn that off manually.
Like neuro, I like that I can use the remote/transmitter directly wired to the DSLR too. I have a Canon 7D and Canon 350D... and my Giga Pro has connecting cords that fit both of these cameras. The Giga Pro wasn't the cheapest, but it was worth the $90 or so that I paid for it, and I've used it often - and as it's so small and handy, I can take it with me easily anywhere, any time.
Hope this helps.