I still use one of the gen 1 WFRs. We got ours when they offered a huge discount to AIR Forums members.
It works fine with the newest firmware updates, but I still have to be sure that I turn the antenna booster on before hitting the WFR switch (the antenna booster, when off, connects the signal cable to ground, which blows the WFR fuse). I don't fully trust the unit, but I haven't really had any issues with it either in the last couple years. It did lose all my settings at one point during an upgrade, but that was at least a year ago.
I still sort of wish I'd just gotten an old WRT54G and installed dd-wrt on it. I did exactly that recently to provide internet service for a show I help to run, and it worked beautifully (only the people working the show could use it, so it wasn't heavily loaded). However, that solution would've been a lot harder too, for mounting an antenna outside somewhere, running the wires, and the software isn't geared toward what the WFR is trying to do, so the user interface wouldn't have been as nice, either.
This reminds me, I should check the status of the zip tie...it's been up there 3 or 4 years now...
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab