I purchased on and just received it today based on the excellent reviews. My experience differs. The unit I received has a defective 510 connector. I have attached 5 different atomizers to the SX mini which are working fine on other mods and all elicit a "low resistance" warning when screwed down flush with the 510 connector plate. However if I only allow one or two threads to contact so that the atomizers are loose to "flop around" on the unit all five atomizers fire properly. As a compounding issue the vendor in Melbourne, FL does not list a telephone number. That in itself is not something that I consider a mark of quality in a supplier.
As you can no doubt guess I am not happy either with the quality of the SX Mini nor the service available from the supplier.