Integy = $40
Hudy = $100
Integy does camber, caster, toe, is easy to read, easy to set up, works on a limited number of cars (all 1/10th scale cars - no 1/8th)
Hudy does camber, caster, toe, is harder for ME to read, easy to set up, has models for all kinds of cars.
Bang for buck - Integy. I like mine TONS. I have a Hudy too and I don't know where I put it!