Reddit mentions of TEAR-AID Fabric Repair Kit, 3 in x 5 ft Roll, Type A, Single

Personally I'd say that is a useful craft for crossing rivers and lakes, rather than traveling down them. At the very least, exercise extreme caution using that in any kind of swiftwater/rapids, regardless of what the manufacturer states. I can tell you just from looking at the picture of this thing that 1) it has no self bailing feature, which means trouble in any kind of waves, and 2) those seams would rip very quickly if they were ever exposed to any serious external stress or strain (ie rocks). If you look at conventional Inflatable Kayaks, or reputable packrafts from Alpacka or Kokopelli you'll notice that none of these boats have flabby external seams like the one from Klymit. This is because that would be a critical weak point. I love Klymit's sleeping pads, but I'd be very hesitant to trust a boat from them to carry me down a river for any serious distance, even on a tame body of water like the Buffalo.

As someone who is crazy passionate about paddlesports, and has rented packrafts in the past, and is currently saving for one, let me just say that if it is something you're serious about getting into, you need to be prepared to shell out some big bucks. Good paddle gear that lasts, gets you out on the water, and home safe is not cheap. Whether we're talking pfds, paddles, drybags, and especially boats. It an expensive hobby that requires serious investment and dedication to form and skill, in addition a lot of time and social networking. This applies as much to Canoe tripping the BWCA as it does rafting the Grand Canyon The newly emerging sport of packrafting is even pricer than the usual entry points.

That being said though, as my old mentor told me, use whatever get's you out on the water, because that is what makes a person into a paddler. The Buffalo is pretty well known as a tame and forgiving river, with a lot of people present. If you take caution, and portage anything that looks like it would give you trouble (and ere on the side of caution, like I said that boat definitely cannot stand up to any serious abuse), you should be fine. However, I would suggest the following:

1. Beef up your patch kit, buy yourself some Tear Aid type-A, and some Aquaseal and Cotal-240, and some generic isoprophal alcohol (97% and up). These products are used for all kinds of waterproof patching be it a drysuit, a whitewater rafts, a canoe, or just about anything else you could think of in this sport, and are likely far tougher than whatever the boat came with. Message me if you want a detailed tutorial on how to patch stuff with them.
   
2. Carry and wear your PFD when on the water. Even on a class II river, it's what keeps you alive if something goes wrong.
   
   Have fun, hope to see you on the water someday!