I needed new tools.
I've used the kit and eraser on several repairs.. both have worked great so far.
Just a product review. I have used the older Drive kit from iFixit for 3 years. I saw this new 64 Bit Driver Kit and decided it was time to upgrade. The kit is awesome. The driver is much easier to handle than the one that came in the older kit. The top rotates smooth. The magnetic case is nice since the old kit wouldn't stay closed after about a year of use. It has T6 security bit, which newer Mac Minis require. The only downside is that the bit type is listed under each bit in black on black foam. It's hard to read, but nothing a silver sharpie couldn't fix. Otherwise, I do prefer the foam bit holder to the blue plastic holders.
As for the Detailing Eraser, it works great. I've used a fiberglass brush in the past to clean junk off contacts and boards. The detailing eraser works just as well in most cases, and you don't have to worry about wearing eye protection, or getting fiberglass stuck in your hand.