Get a flasher, that way if you want to change programs you just send it back but the program stays in your ECM, no need to do without.
The other plus for those that have newers EXs still under warranty, with a chip, when the dealer hooks you up he knows its there and that can cause lots of problems.
With the flasher, you load the program via the OBD port, remove the flasher, and ther is no way they can tell.
I will always contend that chips are all about equal, it's the skill of the programmer that makes them differant, they all have secrets as to what and how to tweak things.
My Apten Diablo from Brian was killer with the mods I had at the time, i moved on and got a flasher from wayne, is to die for.
My next move may be a nitrous program, will try to find a programmer with alot of experiance with nitrous, have talked with wayne,Blk mk8 and Bamachips.
All these guys are on the up and up, for a certain application, one may refer you to another programmer.
In reality a flasher gives you versitility, you keep your program, if it needs to be re-burned, Wayne also tells me that SCT is close to a program that can be sent to you to be downloaded into your flasher, lots of options out there, ck um out