I just added a Blaster to a new Fender 12-string Strat (made in Japan), and thought I'd post the results. The good news is that the guitar sounds clearer with the Blaster on than with it off, even with the tone controls all the way up. There is lots of boost available, but that's not why I got the Blaster; I figure there are other ways to get more gain, if that's what I want. I will keep the boost fairly low. The added clarity is definitely noticeable, though, and that's great.
The bad news is.... the hum. The single-coil noise is most definitely exacerbated with the Blaster in operation. I know Alembic suggests that the control and pickup cavities be shielded during the installation process, and I didn't follow through with that. I was having trouble finding copper foil tape in the Denver area, and I didn't want to wait for it to be shipped to me. I found some silver paint available for shielding, but it was more money than I wanted to pay. That's what I get for being in a hurry. The next time I remove the pickguard I will have some copper tape around and finish the job properly.
The Blaster is a neat product; I wonder what it would do for some of my other instruments.... basses, guitars, my buddy's electric mandolin???