EB5AGV looking for a music sheet (usually non-classical)
I usually look for classical in various places (including musescore), and only occasionally jazz. With that said, I find that the quality of the scores found online is often arguable, regardless of source (well, even with printed ones, but less so, and anyway that's a different conversation). My favorite websites for scores are (in this order): Petrucci library, Mutopia project, https://www.baroquemusic.it/ (even though I have not used it much), https://www.musicnotes.com/ (my teacher swears for it, and I attest that the scores that he posts there are excellent, but I don't use it either because I don't like the limitations, and I care about only his own arrangements which I get them from the source 🤣 ) and only last Musescore.
So for me Musescore is not worth it, because I don't use it enough to justify even the discounted price and because the quality of the arrangements are not at a level which suites me (probably the and because should simply be because). Of course YMMV so it might worth for you.