✔ 最佳答案
Actually the sentence itself is wrong.
There is no such thing of (We Feel Him...), it is either (We Find Him...) or (We Think He is...). But in this case, I think the sentence should be (We Find Him To Be a Hardworking Staff).
If my logic is right, of course this is a VERY GOOD comment, it means that whoever wrote this comment, had a very good impression regarding your work ethics and attitude towards work. He/She thinks you are a hardworking person, and hopefully you can keep it up.
Hope this helps!