I have had mine for several years and it still works great. I admit, I still have to look at the directions to install a new tape but no problems installing it. Very good adhesive that lasts a long time.
I love this product, but as many have previously said, it tends to get sticky with build-up and the roll backs up on itself. If you have had problems in the past with your dispenser backing up, maybe this next part will help: I finally took out the smallest circle/ring (where the "used" portion of glue winds up) and took it apart and cleaned it. There is a small part of this that looks like a "c" and is quite thin: it is also the part that has the tab. This tab is supposed to ride over the top of the big flat white circle and also over the small c-shaped raised portion of the dispenser. I guess I had turned this "c" tab upside down when I had previously cleaned it, and it was causing difficulties in spinning. So far, my dispensor is working great! Hopefully it stays working as well, and maybe this explanation can be of some help.
I love this adhesive dispenser. I haven't had any of the usual problems with things coming un-stuck and then floating around under my page protector. The refills are a bit tricky to install the first time, but the instructions are included in every refill box. My only problem with this dispenser is that it occasionally needs to be de-gunked with some Un-Do when it doesn't wanna roll smoothly anymore. After that fix I'm usually good to go again for at least 3 re-fills before I gotta do it again.
I am very particular about my adhesives - especially in the refillable dispenser category. I had difficulty refilling it the first time (accidentally tossed the directions- oops!). The product comes out nice & clean & the objects stay put. It is so easy to use you can zip through a page in no time with this tool. I also have to say that I live in a very remote small town & both the local craft store & discount store carry refills for this dispenser. I am very happy with it!