I've had my Sai for about a year, but was using other devices for the last six months. I'd upgraded from the EZ Sai to the VooPoo Drag2. A week or so ago I picked up the Sai and have been playing with it daily since. What fun! I've got seven or eight different coils--quartz and titanium buckets, multiple Kanthals, etc.--yet keep returning to the basic triple titanium that came with the EZ. The triple titanium just is so reliable and gives such creamy hits as long as there's something in it. I've been using it for wax, crumble, sauce, crystals, etc. Again, great fun.