Last year, I decided a new portable inflator was something I needed, as my old one was dying quickly. Looked at several including the Viair (which is definitely top shelf stuff and worth every dollar), but went with a Milwaukee 12-volt unit. For such a small and relatively inexpensive inflator, it does really well for my truck and 5th Wheel tires.
Keep in mind that virtually all inflators will achieve ~150 psi (according to their ads), but the salient question should be, "how much volume?" Truck and 5th Wheel tires are generally larger than those on a Prius, so volume is important. My old Campbell Hausfeld would do the 150 psi, but not the volume. None of them are going to inflate as quickly as a real (shop type) compressor. Also, about the Harbor Fright stuff... there is an old but true adage, "ya pays yer money and ya takes yer chances." I get it... their stuff is low priced and carries impressive brand names (i.e., Bauer, Chicago, Pittsburgh, Predator, etc.), and they really need our money, but consider what will (or not) work for your when you need it the most.