Classic bait-and-switch pricing and a nightmare to get a refund.
I strongly advise against using NextPCB, especially if you are working with specialized designs (RF boards in my case). I uploaded my Gerber files, received an automated quote of around $350 USD, and paid in full. Instead of starting manufacturing, they went silent. When I reached out about a mysterious duplicate file in my account, support told me it was just a "system issue" and assured me the order was processing. Weeks later, they finally emailed to say their quoting engineer "misread" the process requirements. They demanded a new price of over $1,770 USD—a 500% increase—before they would proceed. I immediately canceled and demanded a refund. Instead of processing the refund, they tried several stall tactics. First, they suddenly offered a new $384 quote (which I rejected, as a price drop that massive meant they were likely compromising on the required materials). Then they asked for my direct bank account details to process the refund, trying to bypass the credit card system, which strips away buyer protection. I had to threaten a formal credit card chargeback and cite standard merchant rules before they finally refunded my original payment, nearly a month after the initial order. Unreliable quoting, poor communication, and shady refund practices.