Avoid these dishonest lowlifes. MuseScore are bait-and-switch thieves desperate to scam a few bucks at a time from people who had no intention of choosing a longer subscription. Same experience as others. They initiate a series of splash screens starting with taking the 7-day free trial and pepper you with upsell screens as you are simply trying to complete the registration. At the end of it all, charged $39.99 for a PRO+ subscription I never wanted. Despite canceling and contacting support within MINUTES of the transaction, they insist that I "was fully informed when I chose the subscription" and at most policy only allows 3/4 refund. To hell with them - this is what they get for their $10. Crap company. Dishonest and desperate just to hold onto $10.
UPDATE: It took two emails just to get the initial partial refund. One more email, a scathing response to their automated customer service feedback survey, and this online review finally got them to refund the remaining balance. They are still a 1-star company for cheating so many people, but if you've been cheated keep hammering until they do you justice and return your money.