The wider ones with two slides are much better. The narrow, single slide spice rack is not as stable. You lose 2 inches or so of vertical space because of the slides, undermount or flat slides would be better. And, they need more width increments. On 16 cabinets, the14 slides sacrifice 3 of storage on each side. The 17 slides (pictured) worked better in an 18 cabinet. Installation was easy because I have a 90 degree angle drill. The screws self tapped in the wooden cabinets well. So, improved convenience but lost some storage space. Very well build and they look nice.
Rating: [5 of 5 Stars!]