YourMembership - does it all, just nothing particularly well
YourMembership (YM) has been used by one of our clients for nearly 15 years because of price point. To be transparent, we are currently looking at other options, as YM is very limited at the pricing the client pays. Our client is using it for membership, website, revenue (dues and events), meeting management, email campaigns, and reporting. There are other functions they're not currently using as well, so there's a wide variety of potential functionality within YM. However, our issue is that none of the functions are done very well - the capabilities are basic, creating reports requires knowledge of Access-like language, websites look as if they were built in 1995, etc. You get what you pay for in this case.
If you're truly looking for an extremely basic AMS, YM might work for you. If you've used other more robust platforms previously (SalesForce, Abila, etc.), you'll be sorely disappointed.