I love this thing! A couple of my friends and I installed this ss with absolutely no problems in about 2 hours (we took our time plus we had no previous mechanical experience).
My shifts are slightly faster, but beyond that my shifts feel much smoother as well. Also, many '00 gt-s like mine have had problems with grinding of the shift cables when shifting into reverse--that is now gone.
Because of it's straight-through design (the stock shifter is 'goosnecked'), the b&m shortshifter shifts with greater accuracy in my opinion (the '00 gt-s celicas are also known for having extremely tight shift gates).
I highly recommend this shifter for any manual celica driver who doesn't already have a shortshifter/quickshifter. It's relatively cheap and is a cinch to install.