I'm putting this at the top so hopefully everyone sees it:
When you sign up for the free trial, there will be a little button to apply whatever seasonal offer they have going on. If you apply the offer, it removes the free trial. Again...the offer REMOVES the free trial.
You have 2 choices: the "sale" offer, or the 7-day free trial. Not both. One or the other.
When you toggle the offer on, the 7-day free trial text very clearly disappears. If you really want to be safe, read the fine print just below it. It's like 6 freaking sentences. You don't need to call your lawyer to interpret it.
Now, is this sneaky? Yes it is. Do they know it's sneaky, but do it anyway because they likely get X amount of their income from people who refuse to read? Yes they do. Well here's an easy solution for you: just freaking read. Take your time and read the words. I mean, they even give you the exact dates in the fine print showing when you will be charged and for how much.
Along those same lines, it would be nice if they gave a little bit more of a refund to you people. Not full price, but 40% or whatever is kind of lowballing it. I think if you guys gave back 75% or more, you'd have half as many negative reviews on here. But, I have no idea what it costs to run a business, so maybe you need to do it this way.
As for the actual Musescore service, it's actually pretty nice. Lots of good sheet music. They have a nice built-in player. You can save favorites etc.
To print, use the playback mixer, view some of the "official" scores etc. you will need the membership. Quite honestly, most people can get by just fine the free way.
I knocked off one star for the "sneaky" business practices, the reports of lowballing the refunds, and because of the bombardment of advertisements trying to get you to subscribe. Especially on mobile.
One last point, well it's the same point from earlier. Please READ. Everyone. We're musicians. We're supposed to be good at it.