Looking to buy one . Anybody have experience with them ?  Comment?Any online vendors selling them for under $200?

If you buy or plan to buy a lot of Bally/Stern early solid state pins, then 1 Alltek board is a must-have in my opinion.  Great for trouble-shooting in a pinch and when your existing MPU goes for a crap.  They aren't bulletproof however, and if you do fry it, you probably won't be able to repair it yourself or find anyone local who can.  They do come with a lifetime guarantee however, so that's peace of mind.   Used ones come up once in a while, but still command around $150.  Maybe Sparky has one left.