Also, for those that bought the play asia dragon quest 1,2,3 switch multi language game and are STILL waiting, it should be arriving soon. At least I know that in reference to the north American continent. I got mine yesterday and I saw some youtubers that made videos of their copies that are in canada.
On the release itself:
The games are for sure on the cartridge. I put it in my switch and immediately it was ready to play - no download at all. The interesting bit is that since it contains three games, each game has its own icon on the menu. Which is strange because if you got the Mana collection, which are both by SE, it just has one icon and you then click into the game where it has an in game menu that allows you to pick which one you want to play. I'd never seen this before lol.
Also, the games start up with the language of your switch from what I assume. When I started DQ 1 just to take a look, it never asked what language I wanted to play in, it simply started in english. I think it reads your system before starting. Which is also different than the Mana release because it allows you to pick the language before you start.
Everything else about the games you can find in reviews on youtube, like how good the ports themselves are. So I wont go into too much detail on that. These are just some unique oddities that I noticed. Also, the box art is all in what I believe to be mandarin? Even the spine is - so when you put it on your shelf it doesn't say "Dragon Quest" in english. The inside of the box contains solely the cartridge, no manual and no reversible cover, also unlike the mana collection release.
I guess my verdict is to only buy this if you desperately want the games physically and in english no matter what.