I'm using Boa boots, and really like them. The traction is good, and they are a cinch to put on. They seem to be really well made. At the time I bought them, I believe the boots were expected to last approx 400 miles, depending on conditions and care. For me that would be 5 or 6 years, easy. My mare's hooves are in much better condition without shoes. She does still have tender soles, even with the boots, but she's only been barefoot about 6 months and we had a very wet year. Hooves need to be dry to really toughen up.
But, back to the boots: I thought they were the easiest on and off, better than Old Macs or Easy Boots. Only one ever came off was when she stepped in a hole. My mare had no trouble getting used to them either, she seemed fine with them on the first ride.
I do need to use the gaiters with my mare, but they fit in the boot and don't hinder putting the boot on the horse.