My router table is a POS, and I have been planning a new one for some time
now. While I love my Bosch 1617, I was going to buy a new 15a router for
the new table.

I just saw an ad for an old 1hp shaper. I haven't seen it yet, but they
claim it is in good shape, takes all router bits, has a 1hp motor, and
weighs 160 pounds.
I am thinking it might make a good substitute for the new router/router
table. It will certainly be cheaper. But I have never even used a shaper,
so I would appreciate some advice.

Do they take router bits and work well with them?
The 1hp motor sounds weaker than my 2hp 1617, but I suspect they can't be
compared like that. How will a 1hp shaper perform compared to a router?
Can you just compare amps, or do they not compare since the motor types are
different?