Before I bought my Spider Jam  in Aug 2008 I had done extensive research of the GDEC and played through one at a local music store. As far as I knew at that time Fender was the only mfg with a 'jamming' amplifier.

I thought tte GDEC sounded pretty cool and the day I was ready to order the GDEC I just happened upon a review of the recently released Line 6 Spider Jam.

Just based on the review I read about the Spider Jam I decided against the GDEC.

None of the local dealers had any Spider Jam amps in stock and I was told by one Line 6 dealer that he had no idea when he would one into stock.

So I ordered one from musiciansfriend.com

I had not even heard or played through a Spider Jam until I received mine.  I was very pleased to find that the Spider Jam is so far superior to the GDEC that they are not even comparable.

IMO the only way Fender is going to compete with the SJ is if the new GDEC 3 is a total redesign.

If you campare a SJ side by side with GDEC the GDEC looks and sounds like a toy.