I think the sound of the K and K Pure Mini is significantly more natural than the under saddle pickups I have in other guitars.. I really like the way it is installed compared to the under saddle design. I'm playing without a preamp into a Fishman LoudBox amp and there is plenty of signal. The pickups seem a little more sensitive to my hand hitting the bridge and top when I'm playing more roughly, but not to the point of being a problem. I have already bought a second K and K to go into another acoustic guitar. These seem to me to be a superior pickup system, and although I will likely try a preamp at some point, I'm plenty happy with it as is.
I feel the K&K Pure Mini is an easy choice. There are lots of new pickups on the market, but I don't think they have surpassed what the K&K does. I have them installed in several instruments, including an octave mandolin. They all work well with or without a preamp. Sometimes it's just easier to plug straight into the board at an open mic and avoid the fuss. People all comment on how good my guitar sounds.
I read about the K&K line of products when researching a guitar model. I was intrigued by the simplicity of this system and liked the design so I gave them a go. I will say I have been exceedingly happy with the results. Easy to install and the sound I get coupled with the XLR pre is remarkable. I'm currently running these through a Fender Mustang II which offers a very clean sound and a lot of flexibility. I like them so much that I have purchased another set of pickups for an additional guitar.
I highly recommend this system. In addition, Shoreline has been outstanding to work with and they will be my 'go to' vendor in the future.
Finally the natural acoustic sound I've been looking for! Installation was relatively straightforward in my Taylor 526. Couldn't be happier! Many thanks to the fine folks at Shoreline for excellent service and fast shipping.
Tough to beat value simplicity and sound bundle. It is "hot" as some have commented (this directly into a Loudbox) and requires some tweaking. Once that's done it's fire and forget for up to medium volume venues. Little if any quack. Had them in a J45 and the CEO -7. Both sounded natural with minimal if any quack or mud. Per John's suggestion I'm going to get a Red Eye to smooth it out a bit.