Realistically, how comfortable were you in your target language at level B1?

I've been thinking quite a bit about this lately, as I recently joined a language class where passing the exam serves as proof of having reached B2. So all the people in this class are officially at a B1 level.

I know the official description of B1, but in class, there's quite a range when it comes to people's actual level: some are pretty much fluent and only make slight grammar mistakes/have an accent, while others are barely able to string a sentence together. It's been the same in all language classes I've taken, no matter the language, so I'm curious to hear from more people what their experiences were at that level.

Were you actually able to "understand the main points of clear standard input on familiar matters regularly encountered in work, school, leisure, etc., deal with most situations likely to arise whilst travelling in an area where the language is spoken, produce simple connected text on topics which are familiar or of personal interest, and to describe experiences and events, dreams, hopes & ambitions and briefly give reasons and explanations for opinions and plans"?