Durability issues with SMSL M500 MKIII?

Last year I bought a used, like new SMSL M500 MKIII on Amazon for about $460 which I thought was a great deal. For about 10 months I had no problem and it's been great. Unfortunately, the remote stopped working for it and tech support determined there was a problem with the machine itself and not the remote. Not a huge deal breaker but does make switching between headphones and speakers inconvenient and annoying. Though sometimes I need to switch quickly if I'm listening to music on my speakers and then need to answer a phone call (which I prefer to do over headphones).

The SMSL store on Amazon is really helpful though and offered me to either send it in for repairs (I pay for shipping to China and they pay for repairs and shipping back) or a full refund. I figured my best option would be to just do the refund and by a new one since shipping would be at least $70.

My question is, have other people had the same or similar issues with new M500s? I wanted to buy it on Amazon again to get the same great customer service but they only have a used one available and it's $504 (so it's not much cheaper than buying new at $530). However, I don't want to buy a new M500 MKIII if it still has issues connecting to the remote or other problems down the line. I tried searching if other people had my problem but all results are for the first gen M500.

Any help would be great!