I have purchased their MinerMaster Pro-C https://minermaster.com/product/minermaster/ Payment is by BTC or 2 other Crypto's only. Shipping is $150.00 which almost double's the cost. The unit was ordered and paid on the 10 of Dec 2018 and was received on 19th of Jan 2019. Happy with unit, all good and delivered on the performance metric's (cooling & noise reduction)
I then became aware of the immersion unit MinerMaster PRO-A+ immersion cooler https://minermaster.com/product/minermaster-pro-a-plus/ and placed an order on the 10th of February 2019 Order #2265. Unit not yet received. Have sent several message's and e-mail's to Minermaster which have gone UNANSWERED.
Would advise caution as they have not responded. Even if they have a valid excuse for the delay, there is no excuse for not responding in a timely manner to keep me informed.
(I will update as this progresses with the eventual outcome)