I've waited a little while before responding to this post to see what others might say. I also received several PM's asking for my opinion. Here are my thoughts for what they are worth.
A ten minute drop in kit.... now that has to be a joke. You might be able to drop it in in ten minutes but in the end, ask yourself, what do you really have and what have you really accomplished
I agree with others that a Pro-Tune or even a home tune if a person is equipped and has the knowledge is far superior to a "package" kit. If it is done properly, a TurboTune will last the life of the gun with the exception of course that some springs do break and are a maintenance item and may need to be replaced in the future. Even then, if properly maintained and the correct pellet weights are used and no dry firing, the springs can have a very long life span.

I have guns out there that I tuned 8-10 years ago that shoot as well now as they did then. In all of the years that I have tuned guns and we're talking about several thousand TurboTunes, I have only had about ten or so of the JM springs break and that was usually because of incorrect pellet weight or someone introducing lube into the compression chamber or barrel. That's abuse. :0
Instead of doing a "Band-Aid fix" as someone put it, in my opinion your money is far better spent on having a real tune done (or doing one yourself if possible) and having fitted and finished parts fitted to your particular gun as it is being tuned. And the "Band-Aid" fix is usually only temporary and a small part of the tuning process. It's worth little or nothing if all of the other things that are done while tuning are not completed and that doesn't come in any kit. So really, what are you getting...

? And like other Pro-Tuners such as Gene and Ed (Shadow) have said,and if I were still tuning guns, I would never ever consider such an option. For a few dollars more you can get hand crafted results and many years of enjoyment and usually trouble free shooting.
Take the money that you are/were going to spend for a "fix", save and/or add a little more and get the job done or do the job right. You will be much harrier in the long run for it.