I don't know what heavy abuse would be for a plastic water bottle, BPA-Free or not, but literally the day the new Tritan bottles became available, I ordered two. My wife and I each carry one every day along with our lunch. I don't know how many years of daily use that is, but it's a lot and they have held up very well. I've dropped mine on concrete, tile, asphalt, etc. and other than some minor scuffs and scratches, they're good to go. No plastic taste here either and I live in an insanely hot/humid environment.
I suppose if I had my choice, I'd go with a stainless steel bottle but I didn't and I'm fine with these. I actually just picked up another one, the 48oz size and now carry it and my 32oz to work (I drink a lot of water). I'm looking forward to having it on camping trips.
Also, in all of the many years I've used Nalgene bottles daily, the only thing I've ever had fail is the leash on one cap. It just wore out and cracked. I also washed it on the bottom rack of my dishwasher every day for years and years before it went. The funny thing is, the other one which was bought at the same time and used the same amount is still in great shape.