8' is really, really short. Without a keel, the attribute that helps your boat 'track' or be paddled in a straight line, is its length. My solo canoe is 12', and while it's an excellent fishing platform, it doesn't track nearly as straight as the 14' and 15' solo canoes I've paddled. Trying to use one of these to cross a lake - assuming you and your gear weigh in under 200# - will likely be an exercise in frustration, although not futility. Also, if one of the clips or creases failed and you wound up taking a swim, in the back-country, on a cold early-morning paddle in to hunt deer out of a vessel with no inherent buoyancy... well, I can imagine a lot of ways for that story to end tragically.
To get the roll-up capability, you have to sacrifice a lot of things that I, for one, really like to have in a boat. Carrying capacity, handling, durability, versatility.
That said if someone wants some recitational kayaks for their kids or grandkids that won't take up much space in an RV or lake cabin, these would probably be an excellent option. Or a svelte motorcyclist who wants to ride a dirt bike to fish a remote lake.
Which is not meant to talk you out of anything. You buy what you want with your money. My advice, though - assuming you have the storage space - is a used Royalex or aluminum canoe, about 15' long, with bench seats arranged so you can sit in the bow, facing the stern, and paddle 'backwards', with your gear providing weight in the "bow".
