We’ve had to work in Pharo for our OOP uni course, and it was one of the worse experiences I’ve had in school. Mind you, it was something like 7 years ago, so the language may very well be a lot better now, but the whole “your IDE is the code” felt cubersome, it was buggy and crashed randomly, and in general I spent more time fighting with the IDE than doing something useful.

It was a bad time, but also a great learning experience. Being forced to work in something that IMO sucks is an useful skill, but I never want to see that language again :D