I have had the Mod for 3.5 months and I have noticed the following problems.

1. At the connection point of the mod with the atomizer, there is a wheel that unscrews along with the atomizer. I imagine that with a little glue, the issue can be resolved.

2. The battery cap has a hole in the center where a small screw is screwed in. The screw cannot be tightened and if you don't pay attention, it will be lost.

3. Recently, it was displaying the error message "SHORT," meaning the atomizer was short-circuited. This was resolved by tightening the 2 top and 2 bottom screws of the casing, which had loosened after 3.5 months of use.

4. The micro USB port, which is the charging port, has become loose and as a result, the charging cable disconnects. This resulted in waking up one morning with the pleasant surprise that my battery was empty.

I bought the MOD for 130 euros. With that amount of money, I expected quality. It is definitely not worth the money.