I have an unfair advantage… I've had 33 years to collect my MontBell gear. My first MontBell product was a nylon rain poncho that I purchased in 1977. Since then I've bought sleeping bags, rain jackets, solar panels, bicycle panniers, shoes, backpacks, work shirts, hiking shirts, underwear, shelters, headlamps, sleeping pads, kayaking gear, trekking poles, even earthquake emergency kits etc, etc, etc., all from MontBell, in part because they make such good gear, but also in part because it is just about the cheapest outdoor gear you can get in Japan, plus it is my favorite outdoor store to visit here in Japan. I wouldn't know how much of their gear I have and have had… I've never counted… but it is a lot.
My prize MontBell item is my #3 UL Alpine Down Hugger from 2006. My longest lasting and still functional converted it into an experimental, knee-length rain cagoule was my first MontBell purchase: the Hydrobreeze Rain Poncho. I bought it in 1977 and it lasted until 2006 after constant use. The worst MontBell item I ever bought is a toss up between the UL Comfort Pad, which, even after having it replaced with a new pad three times, delaminated on me each time, or the Convertible Light 3/4 Pants, which wore like a wet rag and flapped around so much in the wind that I thought I'd blow away.
The most interesting MontBell item I've seen was the first iteration of the Monoframe Diamond Shelter which, unlike the later versions, was made of three separate pieces, the outer shell, the inner floor, and the inner netting. It was too far ahead of its time and almost no one bought it. Even the MontBell store clerk didn't know how it was supposed to be used.
I've been spending the last month cleaning out my closets and getting rid of a lot of stuff. A lot of MontBell stuff is going out the door, so soon I will be a MontBell Pauper!