Where are these reviews? I had read good things about the 1-ton crane. I can't see me using it often so I though that for $100 (w/ coupon) it was a good deal.
Google will provide a few reviews; no bad ones, just different ones pertaining to the different scenarios.
If you don't use it that often, the 1 ton should work just fine especially on smaller engines for smaller cars.. On larger cars with deep engine bays, you might find yourself in a pickle and have to pull/install from the side of the vehicle, not to mention removing the hood. When removing the body from frame on a resto, you will probably need the larger one anyway. In most cases this job requires the most height and reach obtainable.
On a side note, the rule of thumb ( for me at least ) is to divide the lift rate by two to be on the safe side. Also, the further you extend, the lift rate decreases yet again for every notch lengthened. So for a few more bucks, I say bite the bullet and go with the larger unit that also has a heavier lift rate to cover all your needs.
As far as the 1 ton being a good deal for a $100, I think its a great deal. Just as long as the job doesn't require the larger unit.