Even though I'm used to working in extreme temperatures as an athlete, QSLQYB's heat lamps and mats are superior. Sadly, their customer service is every bit as impulsive as their merchandise. Despite being promised quick delivery, the terrarium heat lamp I ordered took weeks to arrive. It wasn't the right size and didn't fit my terrarium when I eventually got it. The customer support agent was nasty and unhelpful when I tried to return it. The website's navigational challenges and ambiguous product descriptions made problems worse. In the end, I spent time and money on a pointless item. Avoid the hassle by purchasing your pet supplies somewhere else. The hassle is not worth QSLQYB.