I've used a few other accessories with my dynavap and this one is easily my favorite. I usede to mix it up with accessories for the dynavap but since getting this I haven't used anything else. It really does help it cool down and having the control with the hole really improves the experience. I also was pleasantly surprised that it has the anti-roll bump, didn't think it would matter but i like it as it helps guide my fingers without looking and I have broken glass before with it rolling off a table so it is actually a really great idea that I haven't seen elsewhere. The product is listed as limited run but they really should consider making it a mainstay. It seems really well made but if I ever do break it I hope it is still available. If I had one complaint it would be that hole is a little tight so inserting the dynavap tip makes me a little nervous that it will break. I haven't had any issues and the glass seems sturdy plus I wouldn't want it to be too loose. It really isn't a problem, there is a chance it becomes one later so it doesn't hurt my opinion or recommendation just something that is a little concerning and worth mentioning in my opinion.