Speed3 owner now. '05 Subaru Legacy GT owner before that. Purchased the Cobb AccessPort within 2 months of buying my LGT. Beyond a doubt, zero hesitation....the absolute best mod purchase that I made. And that's coming from a guy that spent nearly $20 Large on so many mods its rediculous (built motor, two different bigger turbos, ACT clutch/fly, BBKs, two different FMIC setups, etc etc.).
The AccessPort is so extremely easy to use. Plug it into the OBDII port, turn the ignition key to ON, and upload a new map to the ECU. Done! Take about 10 minutes if you move slowly.
The flexibility of the AP is simply amazing. It starts with the "canned maps" that Cobb will make available. Typically its a Stage 1 map (for completely stock setup) and Stage 2 map (usually requires a Downpipe). Further, Cobb provides different Stg 1 & Stg 2 base maps for the various grades of octane fuel available around the country. Namely 91 oct for suckers like me who live in CA. And 93 oct for lucky folks living in states with zippier gasoline. The difference between the two grades of fuel can be around 10-15 hp.
Once you own the AP, the skies the limit from there on. There are many qualified, certified Cobb "ProTuners" that use a special version of software similar to StreetTuner sold by Cobb. You pay around $350-$400 bucks for a ProTune. This allows for a customized, optimized ECU tune specific to your vehicle's mods. Maybe you have a CAI. More open exhaust. FMIC whatever. Getting a ProTune is always the best bet unless you stick with no mods (Stage 1) or few mods (Stage 2).
As I mentioned, Cobb also makes "StreetTuner" software available for those brave folks wanting to do their own road tunes. Personally, I know that I'm not qualified to try it.
The best part is all my advocacy of the AccessPort comes from my experience with the older Version 1 AP. The new AP v.2 is so much more sophisticated. It provides a wealth of more information, allows for real-time changes between ECU maps, acts like a digital gauge display for everything the ECU monitors.
I don't care if its calendar 2008 before the AccessPort comes out. I am patiently waiting for what I already know is perfect.
NOW HURRY UP COBB GUYS!!!!!!!! (burnout)