Extenderz.com has a rating of 1.0 star from 1 review, indicating that most customers are generally dissatisfied with their purchases.
I strongly warned against buying from them. They are reselling products from different companies at high mark ups.
I purchased the very expensive (Thrusting Spinning Suction Masturbation Cup). After buying it, I found out that it was just a rotating arm that will rip your member off.(A lot of fake reviews out there) -My guess is that they gave a better version to reviewers or paid reviewers to lie(Most likely).
It feels cheap quality as well. The worse part of their scam is the fact that they refuse to fulfil their warranty on defective products, so you basically get scammed. I lost 200 dollars because of it and I hope this gets to other people before they are scammed.
Tip for consumers:
Avoid it at all costs. You are not covered by refunds. There is better trusted options out there.