These work really well, built strong enough to last longer than the furniture. I haven't tried the upgraded locking devices, but if you are accurate with mounting the slides they aren't necessary, especially when you mount the drawer fronts separately. The standard locking device has a height adjustment in front and in back, but the front ones don't seem to lock in place very well so I have never relied on them to adjust the drawer alignment.
(Posted on 2/19/16)
Awesome productReview by Max
I built the cabinets for my daughter's new kitchen remodel. After quite a bit of research I decided on the Blum Tandem drawer slides.. I can tell you I made the right choice, these are the smoothest and quietest slides I have ever used. They were very easy to install and came with good installation instructions. I highly recommend these slides and take my hat off to Blum for the best drawer slides I have ever used.
(Posted on 10/1/15)
Great SlidesReview by Lee
I used these slides for my kitchen remodel. I built my canines and used the slides for all of the drawers and rollouts - a total of 24 drawers and rollouts. They are great! Easy to install. Smooth easy action. I am hooked.
(Posted on 5/3/15)