The Mistic 2.0 is actually pretty good. It's not a small stealthy mod though... it's more of a box mod (4 x 1.75 inches) that uses 10ml pods. It's 1700mah battery lasts well throughout the day and it is rated at 30w with a .25ohm coil. The button is firm and clicks when activated (no auto on this one.) The draw is open and works well for a direct lung hit and provides a good amount of vapor. I happened to run into them at a pharmacy (Walgreens) and got one there.
At $20 per 10ml the pods are more than I want to spend so I drilled the top. I was using a silicone plug, but found I kept knocking it loose so I've been using tape over the hole untill I find a better solution for a plug. The juice is listed a 4mg and I think it must be nic salts, but I've been refilling with my DIY 24mg and it works well.
Rebuilding hasn't been possible so far. I suspect that the bottom of the pod is glued to the tank and doesn't want to release with moderate pressure. I haven't tried heat yet, but that seems to be the next option. I was hoping someone had tried a successful hack to do a rebuild but haven't heard of one yet.
I like this little mod. It won't become my fav. all dayer simply because it isn't economic. It's very handy for a backup when out and a mod which might be worthwhile for new vapers.