I have had the Highroller for almost a year now, it is super easy to mount my bike on it. I can have it mounted and dismounted in about a minute, also great that I don't have to remove the tires to mount it.
On the other hand, I have recently noticed that it seems to have a little play in it, by that I mean my mountain bike seems to rock a little side to side. I don't know if something is becoming loose or what? I guess I will have to continue to monitor it to see if it gets any looser.
Besides that it is great, it even comes with a build in lock, of course you have to add in the lock core to make it work.