Originally Posted by roastdawgg
--snip-- I just want a wireless system that will function when i want it too. thanks.
I have friends who use them and they work well _most_ of the time. The deal with any of the wireless trigger systems boils down to the antennas inside of them. Interference, caused by close proximity to light stands or other metal objects near either the transmitter or receiver, can cause the triggers to mis-fire or not fire reliably. Units with internal antennas are more sensitive to the environment they're in and mis-fire more often than units with larger, external antennas. This is true regardless of price. The MicroSync system ($300) is just as bad as the eBay triggers (~$40) in this regard.
The internal antenna units are also more sensitive to orientation. Wireless communication works best if both the Tx antenna and Rx antenna are oriented in the same plane (horizontal, vertical, diagonal, whatever). Rotating your camera from horizontal to vertical can be a source of intermittent operation.
I don't mention the above to scare you off, but rather to point out some of the more common causes of intermittent behavior. You can restore consistent operation by arranging the receivers so that they're not touching the light stands (the most common culprit), or are aligned with the transmitter.
I took a quick look at the AlienBees unit, and for $80 I think I'd get that set before I spent $40 on an eBay set. If the specs are true, the Alien Bees unit has about twice the range and double the number of channels of the ones I've seen on eBay. Plus, AlienBees is known for their great customer support and liberal return policy.
Don't discount the ability to change channels. There are many, many sources of radio interference and sometimes your 'regular' channel gets hammered by outside factors.