Yes, I have the kit and also found it has a learning curve. You need more stuff than just this kit... you need the right kind of printer, and a good laminator, not to mention some kind of software for creating high resolution artwork. All of these things take time and practice to get the best out of... but it is quite enjoyable if you like doing graphics arts!
I had several email exchanges and phone calls with the company (I think I was talking to the inventor of the system, he was that knowledgeable) before buying the kit.
The whole process (whether used for PCBs or artwork) is critically dependent on getting a print with a nice, heavy layer of the right kind of toner on to the transfer paper. Not all toners give good results, not all printers lay it down thick enough. The supplier recommended two methods: either (1) print the artwork on any printer, then use a Canon personal copier to make the toner version, or (2) use an older HP laserjet e.g. a LJ 2200 or 2300 to print the artwork using original HP toner cartridges. Either of these are cheap on eBay.
I tried both and found the Canon copier does not provide the same resolution as the laser printer, but if ultimate resolution is not important then it works fine.
It was a bit of a project to find the right driver from the HP web site that would actually deliver full 1200dpi resolution from the older printers under Windows 7, but once everything was dialed in - the output is outstanding, and the toner transfer paper is 100% effective at applying it to whatever you're working on.
A completely different method for making instrument panels could be to use a vinyl cutter to cut the artwork out directly from adhesive backed vinyl. I haven't tried that yet, but have recently acquired a cutter (with its own learning curve, of course) and it easily cuts precisely enough to make letters, numbers, and other graphics for a panel - in any colour (and white). This process also has a learning curve, of course. The most important part is probably to learn to enjoy the learning!