Welcome! I don't think you'll be disappointed. I've had them for a few months and have been very happy.

Since you're not really paying for / buying a new ATA it's reasonable to receive a recycled one. If it "breaks", they'll replace it for free - so you're not at risk and these things last a very long time. I'm writing this on a computer connected to my old Vonage RT31P2 (many, many years old). Just be sure to keep it well ventilated.