What is everyones opinion on Unichip? I have been considdering one to be putting me on until I can afford a complete replacement ECU.

Current mods are:

3" TBE
Pod filter (not oiled) with cold air feed
Standard top mount with water spray
Stock TD04 but looking to upgrade to VF23 in near future
MBC (not fitted at the moment)
Walbro 500bhp fuel pump on the way

I have heard of issies with unichip, but if I get it tuned by someone who is good with Unichip products it shouldn't be a problem. Should it?????