I've never had a complaint with the 2 Garretts ProPointers which I bought back in 2010. I don't have any experiences with device failures on either in all that time.
I did get the TRX, mainly because I wanted the extra depth without having to trick the Garretts with a coin or have to carry a Pistol Probe which gets great distance, yet there were things I really disliked about the Pistol besides having to carry it along with my Garretts. So, the TRX is great for getting an easy 2.75-3 inches, which happens to be the depth of the majority of my detection targets pre-dig, and that saves me hole size dimensions.
The Garretts has served me well and I'll always have one. You might consider buying one of the Garretts soon to be sold by owners since getting the TRX, and save some bucks off of retail. Seems to me that about $75 for a good operational used Propointer is feasible. I am reading some pricey repair quotes from Garretts lately for fixing a few returns. Used to be that Garretts would repair an outta warranty unit or just charge $25-30 at worst.
The TRX will be my keeper though unless it fails badly. It has only been out like 2 months, so time will have to tell. If I was buying my first pinpointer today it would likely be the TRX.
It's a little hard to explain though, but I believe I could actually retrieve targets a little faster with the Garretts if 1-4 inches. The entire wand end of the Propointer being hot maybe cause me to say that, even though it doesn't do 3 inches with factory setting of 3" like the TRX. There's lots of good things about both pointers. martin