What can I say... It's French, buy one ! LOL
More seriously, a lot of my friends here in France have it and they would not trade it back for any machine.
Now, they sometimes talk about some downsides like the fact there is a battery for the coil. (If I understood correctly) Apparently, this battery does not last forever and you then may purchase a new one. That can be expensive. Also, the connection to recharge the coil battery sometimes break and that can also be expensive to fix. There sometimes has been issues with the updates too. Now, every detector has its downsides. So far, everybody agrees on the fact the Deus is a great machine.
I also have had the opportunity to talk to Alain Loubet, the guy who created XP and who owns the company and he happens to be a great guy. But that, is just a bonus !