While I don't hate it, I'm not a huge fan of it, you have this huge build up for only one girl to be chosen, only at the end for him to choose all three.
To me it feels kind of cheap.
So yeah I'm not upset about it, but at the same time I'm not a huge fan of it.
Regardless of how Quintessential Quintuplets ended, at least I appreciate the mangaka for that story on committing to one girl at the end instead of having the MC choose all of them.
Heck I wouldn't have mind if Amagami Sister went the We Never Learn route.