So I was looking around on PEStuning.com at their A4 B6 3.0L ECU upgrade and had a couple questions. First, has anyone else had experience with PES? Are they good? And second, if anyone has had experience with this specific upgrade, is it worth it? It says it gives you about 17 hp and 12 torque but it's nearly $600. I'm really starting to think about it but I don't want to jump for it if it's not very reliable. What do you guys think?