I received the survey invitation via BAEC e mail just the other day. Happy to give 15 minutes if at the end I feel the the opportunity is given to elaborate on answers.
BUT after 15 minutes the progress bar showed less than 10 %. Several 'errors ' later and after over an hour spent, progress is about 30%. Gave up after 'error ' message demanding I answer all of the questions on the page, where only one question was displayed. Tried to reload a few times and waited to allow for slow download speed, but only ever one question presented.
Working on PC, some may have had success with mobile device, but no longer interested in providing feedback. I am beginning to wonder how well the answers will be interpreted / filtered for BA management consumption.