I have continuously had a problem where it fails to recognize that I have the libraries installed, so I have to open their stupid MuseHub program for it to rediscover them.
The last time this happened about a month ago, the MuseHub site claimed I did not even have an account, so I suspected that now I may just lose access to the libraries I'd purchased. I emailed their tech support and got the most useless person in the world on the other side who I'm convinced wasn't even reading what I sent to him and was just throwing out pre-conditioned responses. Eventually, I took a gamble by going "Creating Account" and thankfully, it still had my information so that I could use the libraries until the next time it happens...
Anyway, I really like the long articulations in the Berlin Strings and Winds and I've been using them on my upcoming album. They are a much cheaper alternative to the Kontakt libraries of course, but they too are woefully imbalanced.
I have to crank the violas up in the mixer and turn the violins 1 down. Brass instruments do have some great sounds, but are rendered unusable by imbalances between articulations.
It's unfortunate that Musescore 4 has been fumbled so badly and they seem to just not care about improving what seem to me fairly simple things to fix. If their customer service is an indicator, it seems that apathy is to blame.