I am about to build a proof-of-concept website, and I intend to build on it using "Lean Startup" principles. I have friends and acquaintances lined up to try it out, and I will solicit their feedback.
The intended users are hikers and mountain bikers. My friends happen to be in this group. Obviously it would be nice to get feedback from users I don't know, but I have to start somewhere. So I'm looking for tips on how to ask questions so users won't worry about hurting my feelings.
How can I make sure I get honest feedback from users (rather than having them sugar-coat their opinions)?