By far the best pickup for an amplified acoustic sound I've experienced. The guitar sounds truly acoustic, but amplified - it is a basic task for all pickups, but the ones I've had in the past, transducers and USTs, always sound 'electric' and/or imbalanced.
I replaced a Highlander UST pickup in my Sobell Steinbeck guitar, the preferred pickup of the guitarist Martin Simpson, with the K and K Pure Mini. The Highlander unfortunately had to be balanced every time I changed the strings and was a bit unpredictable sound-wise (perhaps not always the case for other users) - something I couldn't take the risk on playing live. Sometimes the trebles and basses were hugely different regarding volume. This could be resolved, but it happened regularly. The K and K Pure Mini is predictable and always reliable - once fitted it will always sound the same.
It was simple to install. One change I made to fixing the transducers was to use superglue rather than double sided tape (a trick used by a top luthier). Once the instructions were followed, it was a straightforward installation.
Given the relatively cheap price-point, the pickup is incredible value for what it is - even if it were twice the price it would be good value. I would recommend it to anyone wanting a truly acoustic amplified sound.