Rivet Guns

I need to buy a budget priced rivet gun (for solids). I just want to
spend enough to get a gun that is sufficient to see me through a
project. i.e. it just needs to work and do a good job of setting the
rivets. I am not riveting B747's on the production line.

What is good and what is bad ? I see that Aircraft Spruce have a gun
for $89.00 (ATS AIRCRAFT RIVET GUN #2602). ATS also sells this for $99.
Anyone got this gun ? Comments ? Does it fit standard rivet sets or
are the rivets sets unique to this gun ? Obviously this is about the
cheapest ... what is the next step up and what do I get for the extra
money ?

Thanks,

Tom