It’s been a great device for me. Supremely discreet; you can use it virtually anywhere, which is why I have it (not to mention the plaesure taken in using concentrates to compliment my flower usage).
When I purchased mine, I picked up a second ceramic chamber because of the posts I read regading defective chambers. Glad to say I’ve had zero problems with the rither chamber and am happy to have picked up the second one because it allows me to have two different strains available. Even small dabs can last me more than one hit. So if I have a little left over in chamber 1 but want a different strain I just swap out chamber 1 for chamber 2.
One thing I will note is that I seldom vape anything without some sort of diffusion, either a bubbler for my nano, a micro bubbler for my edge (which I use without h2o), or most recently the great medium length dimpled stems by Vlad for my Mi 3. The vapor the plus makes on medium (green) and high (white) levels is too hot for me. Since I use the plus for stealth I won’t bother fitting it to some sort of difuser. I just use it pretty much always on low (blue).