For Me,
It's a BIG YES!!
For me this is the most important thing because you will never know if others won't tell you what you lack. You will only know a part of your strategy / personality if no one will tell you.
It's a part also a part of learning process.
Guys I have a question for you all, Is it important to communicate with your client? I know your answer would be a big yes, right?
Feedback is a part of communication without it, it is not communicating.
SENDER -> MESSAGE -> RECIPIENT -> FEEDBACK -> BACK TO SENDER
The client will really reply or answer you and that is what you call a feed back; a part of the communication process.
I' sorry for lecturing in this forum

but the only tip I can with you guys
since AFashionableLife mentioned the list is to tell your client the truth.
@AFashionableLife: Nice post!