If this is the jointer im think of, (i own one myself and use it almost daily) it actually a great jointer. Both tables are adjustable, the knives aren't difficult to change (springs at the bottom of the knife), its powerful enough to face joint hard maple and hickory at full width (6"), and runs very quiet.
My jointer is model 351.227240. It's a late 90s model, around 1998 i think.
Very heavy. Tables are flat and true (the whole thing is cast iron on a sheet metal base).
The only complaint that i really have is that dust collection is difficult. I ended up fully enclosing the base and adding a 4" port to that in order to get enough dust collection. If you dont have a dc, the chips will mostly fall straight down underneath.
I do recommend putting it on wheels in order to move it around.
If iremember correctly, this jointer was made by AMT, and is actually a well made, quality tool.
I believe that either Grizzly or Jet bought out the tooling for this model when AMT went out of business.
Definitely worth the money. Knowing what i know about mine, i would easily pay up to 300 for it again. But i got mine from a friend for $75.00. Ok, i stole it from him for $75.00...
I have a digital copy of the manual if you need it.