I am very happy with my experiences with EFI Performance!
I'm in love with the tune Sean has done on my car (25/30 with Haltech E11v2). It's a real Jeckyl and Hyde, it starts off the key with no throttle and idles so smoothly it's like a sewing machine. Driving off boost is smooth and punchy all through the rev range, then when you open it up, it tries to throw you off the road. PERFECT!!
I also would HIGHLY recommend EFI to anyone looking for a top quality job.