Before buying a product, I always research options, reviews, drawbacks, prices, etc, however the hardest part for me is using the available options with the reviews and ratings to come up with a choice on what is best.
If there was a webapp that could ask me questions to help me choose a product based on features and my requirements, that would be awesome.
Ideally, I think it could work like:
For choosing earphones: what earphone styles have you tried previously, what is your preference/rating of these, what is your budget etc - then it uses all the data from ratings and review from the web and gives you a recommendation?
How do you think it could work - and more importantly, does it exist!