These have been back ordered for a week or so and I finally got mine in yesterday. Now first let me start off by saying I was not expecting any big difference in feel with the sprint boost module that came as part of this setup.
Here are my observations.
1. Everything is plug and play... even the optional led. No splicing of wires or soldering required. Very nice.
2. Instructions were very clear and easy to follow. It took me a total of an hour and a half to do it all including the led install.
3. I highly recommend the led. It makes setting the level of sprint boost and the defaults for how the cruise works extremely easy. If you don't have it, you have to leave the control box that is in the middle by the floor between the driver and passenger exposed so you can see the led on that box to tell what is set.
4. The cruise control works great. It matches the existing controls nicely. I love how the led flashes green to tell you it is ready to set and then turns solid green when it is actually keeping your speed.
5. Sprint boost - all i can say is wow - no more hesitation when pressing that gas pedal. I could not replicate the response this thing gives my by simply just pressing down harder on the gas. I set it on level 4 of 5 and I now feel I can drive around in Drive mode a majority of the time. Prior to this I was always manually shifting.
6. The smartmadness people (yea Rachel) were very helpful and alway eager to answer any questions.
Note on the install: You do remove the speedo up top, the steering wheel plastic behind the wheel, gas pedal and carpet down below. If you are not a flexible person or a very large person I could see someone having issues installing this. A tip when installing... before hooking up the control box to the break pedal, I suggest hooking up the speedo, led and cruise control wires first... it just makes it an easier process. I did this in my garage in Texas yesterday and I did work up a sweat. But hey... if a chick like me can do it, anyone can do it!
I did consider the 451 cruise control and considering the 451 was running 479 and the MDC was 479 with the led and the sprint booster I went for that. I highly recommend it.
Now I am just waiting on my cold air intake with the K&N filter from smartmadness to come in. I will give a review on that.