Originally posted by MrFatBooty
The main thing it saves is the syncros.
If you're good at matching revs, you can actually upshift without using a clutch. Works better on a dog-engagement race box but can still be done with syncromesh.
On the original issue, it sounds like some kind of issue in the clutch hydraulic system.
*edited my original post above with respect to doubleclutching*
As for the original inquiry, not sure if you've tried this but go on a freeway and try downshifting into 4th and 3rd (for example when you exit on an off-ramp). If you find yourself pumping the clutch for 3rd and 4th along with 2nd, then it's probably an hydraulic issue. I would check with the guys who installed it first though.
Shingo