The service is incredibly fast. I ordered my pickups on Tuesday and they arrived on Friday. What's more, it's not like they just pick them up from stock as they really are made to order. I asked for mine to have allen head screws instead of the normal screws (still the one row) and sure enough, that's how they came. When you go through the order page, one of the things you MUST fill in is details of which guitar the pickups will be going into, just in case you've had a touch of brain fade and ordered something that just won't work. Special requests like mine can be put there. The pickups will be installed on Monday afternoon so I'll make sure I post some preliminary comments on Monday evening. Mine will be going into a maple neck-thru Jackson SL3 with OFR. I imagine mine is more middy than yours, which is why I didn't get the Holydiver but from the little I've heard of the effects of a brass block, it may make your guitar fuller in the mids anyway. The stock bridge pickup is a Seymour Duncan JB so I dare say I'll be making a number of comparisons with that pickup.