Not a professional PCB manufacturer, avoid
The experience was awful with many back and forth communications due to mistakes and misunderstanding after the order was placed. Unfortunately things still went wrong after we received the order. The drill hole sizes were wrong, the aluminum substrate was different from what's ordered without consultation. The biggest issue was that we ordered 1 oz copper (35um) and it ended up with only 25um, which led to significantly higher resistance and reduced the power of the heater we designed by more than 30% and therefore make the devices not usable, significantly delaying our progress and affecting our plan. Worst of all, their customer representative, told us this was acceptable and there's nothing wrong on their part, and we should have specified it with 1.5 oz copper to get copper traces of 35um thickness.