Butch,

I have a MFJ-998 in the shack.  I'd give it a 4 out of 5 rating.   It 
will handle 1500 watts, which is more then  my AL-80B or THP solid state 
amp will put out.  The problem I think you will find with  auto tuners 
including the ones built into the radio is limited matching range due to 
the fixed values of L and C. You won't be able to load your 
grandmother's walker on 40 meters.
It has a ton of memories and up and down L and C buttons so you can find 
a match manually if the auto function can't.   An optional 20$ cable 
will interface to many rigs, and when connected this way hitting the 
auto tune button on the rig bypasses the internal tuner, puts the rig 
into cw mode at low power for the tune  process, then returns to 
original mode and   power when tuning is complete.  If the amp relay 
jacks on the tuner are connected between the amp and radio,  the amp 
will be bypassed during tune up.   This relay is also supposed to 
prevent the amp from keying in the event of a high swr, but I can't say 
that I've really  tested this function fully.

There are some menus for which sighted help would be needed, but they 
are the set it and forget it type of stuff.   Things like swr point at 
which it should  start looking for a better match, and swr point for the 
amp relay to bypass the amp.

73, Steve KW3A