I've had my switcher for 6 months and I love it it! It's been very dependable and the battery has a good life of around 12 hours for full charge and I use mine all through that time very often it's one of the best mods I've had and for a great price!
This is my second box mod, coming from a Vapor Flask Stout mod. TLDR; Excellent build quality, super fast charging via USB, fantastic flavor, great for beginner and seasoned users. I didn't realize I ordered the LE version (Light Effects) that lets you customize the LED lighting, which was a welcome surprise. Admittedly, it has more power user features than I know to use, but a welcome option, such as custom wattage curvature settings. Clouds and flavor are very satisfying, especially with the Vaporesso coils. I prefer the GT4 coil for my 3mg juices. What I love - the preset High/Normal/Soft wattage curves. Drop in a new coil, have it detect the coil, use a preset, and I'm good to go. Charging via USB - 2.5 amps? YES!!!! The screen shows % charge on both batteries when charging, as well as estimated time to charge to full. All in all, I highly recommend this mod with the NRG tank, this tank looks and feels heavy duty, making my Baby Beast tank look flimsy by physical comparison. If you are considering it, get it while it's available! IMO it is priced very well for the performance. Enjoy! Personal notes: My first 2 coils with this mod were GT8 and GT6 coils, now on GT4. For my use with 3mg juice, I like the GT4 the most for flavor at around 50W, Normal Preset The 2 coils averaged about ~1400 puffs each over 7 days, roughly 200 puffs per day, about 70 minutes total duration for the lifetime of each coil. Did I mention I love the puff and duration counters? I try to use the counters to see how well certain coils perform vs juices for my use.