Hi Kathy,
I don't disagree -- "horses for courses" I guess.
The pocketwizards have come a long way since their initial release - to the point where they can be used to control power-settings on studio lights - manage modeling lights - are highly programmable - and even correct for some of the shortcomings with Canon's own 2nd curtain timing. Just the AC3 zone controller alone is indispensable.
I take your point re the interchangability with Nikon, but having said that, I think that if one were to change to Nikon, the $$$ involved in changing PW models would be pretty much the least of ones things to worry about. And if Canon were to change the protocol significantly, I think it would cause more of an issue with existing flashes (can't see that happening though).
The "Interference" thing was something that didn't help them at all, but all in all, it hasn't been as big a deal for me personally, and I suspect a lot of others are in a similar situation; first up, the EU versions weren't as affected as the FCC versions - triggering is usually reliable out to around 100 feet (which covers most general lighting situations anyway) - plus - there are further gains to be made simply by seperating the flash from the TT5 using an off camera shoe cord (one may argue that one shouldn't have to do that, but at the end of the day, there are mechanical advantages to doing that anyway -- if one wants to have a heavy-duty rig that's robust).
A couple of things that REALLY didn't help though were (a) a bug in the initial programming software that meant settings weren't always replicated between units correctly (which made an already steep learning curve several orders of magnitude more frustrating), and (b) documentation that was - frankly - abysmal (you should go work for them!). A while back I developed quite a good working relationship with them - gave them some good constructive feedback - and I'm happy to say that they've taken a lot of it on board (from others as well as me, I should mention) ... the loader works reliably now - the documentation is now referenced from within the configuration utility - they've fixed the bug I reported - things like 2nd curtain sync now work - manual test firing now works - and they've continued to add additional functionality (a lot of which can't be done easily either at all, or at least without a dedicated master controller).
All in all I'd say they probably released the product a little too early (possibly radiopopper had a hand in that?), but it's now matured into something that's reasonably reliable. To be honest, they're still a bit like a formula 1 car; very powerful, but also somewhat "twitchy" in that flash settings have to be understood to get the most out of them (eg knowing how the flashs have to be setup for them to work properly), and they do still cause misfires occasionally.