Have had my Solo for around 3 years now. Gets used daily, at least 5-8 times, more if bros come by. Gets dropped, on carpeted floor, daily also, 1-10 times. The Solo itself is in good shape. Have broken 2 mouthpieces and had to replace the battery 6 months ago. For the torture test I have given it, the Solo has come through with flying colors. Luv it and highly recommend it. Start at heat level 4 0r 5 and when the hits slow, up 1 level until hit slows, then up another. Looser pack works better then a tight pack. Ya pack it just right and I have gotten into the third session before it`s used up. Has automatic shutoff after 10 or 12 minutes a session.
Arizer has a new one out, the Air, which is smaller then the Solo. Has gotten real good reviews. Check `em out. I`m seriously thinking about buying one myself, when my wallet says I can.