I bought 2 identical controllers, installed exactly the same one, one worked, and the other immediately smoked! I had 20 days right of return, so it became a warranty case. At first the seller tried to help, but after 2 weeks of providing forms and photos of my system and the damage, it turned out they were just looking for a reason not to honor the warranty. Revain eventually agreed to a discounted refund (-$50) for the defective block. I bought a replacement at full price and now the seller is unresponsive to questions or messages. Time will tell if they were worth it or if they meet the advertised specs which I still can't get a clear answer on? Later updated for performance.
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