British English has many mild phrases for work that has real problems.
Interesting: Strange, and probably not a good idea.
Quite good: Acceptable, but no better than that.
A brave choice: A risky decision that will probably not work.
A bit hit and miss: Some parts work, and many do not.
Not my cup of tea: I do not like it.
It needs a bit of work: It needs a lot of work.