Thanks.

On your earlier post about SB marketing, I too thought it a bit misleading but quite frankly didn't parse it as thoroughly as you did. Nonetheless, I was sufficiently disgruntled with the X5's throttle lag to try just about anything, even snake oil!

I'm what you might call a reluctant X5 owner. With the kids off to school, my wife wanted to downsize so we got her a 335 xdrive and I got her hand me down. I never liked driving it (nor my son for that matter) but, being her car, never made an issue of it either. The combination of throttle lag and transmission lurch drove me bonkers. I even had it on the selling block for a while but our local market is flooded with E53's so I didn't think I'd get what I thought it would be worth for me to keep.

Now that I've installed the SB, I can say it has brought the fun back into driving this thing. I have a more predictable throttle response and the tranny lurch is pretty much eliminated. I don't know if the SB website voltage output graph is accurate for every car or is a simple, representative sample but it seems the faster low end response made all the difference for me. I would imagine there are those who prefer to mash their foot to the metal and for them the SB would be a waste of money because they won't see any difference. For me, this $300 "tweak" was well worth it for driving enjoyment.