Whatever issues Arca may have, their US repair facility - Precision Camera Works - is absolutely stellar. Over many years I have never experienced any delays in service or communication or had problems of any kind. Rather quite the opposite, Bob and his team go above and beyond, and I can recommend them without reservation. While I don't know if they handle international repairs, if there is a problem with Arca service (or any other brand) in your country it may be worth contacting PCW.
If you are in the US, Diane at Arca's US office is quick to respond and help with any questions, and there are several good dealers who can give you straight answers, including Jeff at Badger and Rod at Photomark.
About the Cube, I bought what may have been the first one imported into the US probably 5 years ago (will have to dig out the rcpt to get date, but was told by Arca they didn't know of another one sold here before mine). Paid about $1300 for it at the time and never once regretted it. It has been around the world several times and is still perfect. I would buy another in a second, even at todays price.