I'm not sure which Viair model you are referring too, but their smallest model, the 70P, appears to be very similar to the one I got. Same exact CFM even. 1.06. Same accessories also. NOT that I did a lot of comparison shopping in advance or anything, which was all the more surprising to find it more then a toy. I like the auto shut off if it overheats, and also the digital pressure set buttons, with a digital gauge, that auto shuts off when that pressure is reached.
I can get off the ground with 2-2.5 pounds in my 29" Airstreaks, (Light plane) I'm not trying to blow up a truck tire to 85 PSI, or a 35" ABW even, this ought to suffice for my modest needs OK. Now, after buying it, and reading a few reviews on it, I like it even more. About 9' of fairly heavy gauge 2 conductor, and 2.5' of airline. I've landed a lot of sharp rocky ridges and have never had a tire issue yet, now that I am "aired up" (I also finally got around to putting together a decent patch kit) I full expect that to change, Murphey's Law. Keeping the tire pressure low, 3.5 pounds max for me anyway, seems to be the best way to not have an issue, even if it extends the takeoff roll a bit, and for sure makes it harder to push out of the hangar.