The overall experience was nice, the location is definitely better than what we expected, the stairs are the only controversial point I see in the comments but that's kinda a legs workout so totally up to you, it is a workout though. The place was definitely worth the value of our money, it was a tiny bit dusty but that is something easy to manage from Montserrat next times and I am sure it is related to the current situation and keeping the place closed for a while.
Montserrat let us do a late checkout which was amazing, we had a couple of hours more of luggage-free touring, and the list of Barcelona recommendations is definitely a big plus