I've had no problems on there.
There are a lot of people who are angry that it was made the default at sign-up. I'm not one of them. It seemed unnecessary to me, but if it helps people who find choosing an instance overwhelming, then so be it.
It's kind of crowded, and it can be spammy, but I have a great enthusiasm for blocking such accounts.
@dulcedemon Thanks for your insight! It's really helpful to hear about your experiences. I had no idea people were upset about it being the default, or that it was known for spam. D: I haven't seen it used that way yet (but maybe I'm not using/following things properly)
A sizable portion of everyone I know who tried Mastodon left, and I've felt a little like I'm roaming around in the dark knocking into things while figuring out how it works. I appreciate you shedding some light into it! :)