From looks to use

Why do all the things we fall in love with over the preview pics always turn out to be less than worthy of their price tags?  I went out to buy a new car, looking for something fun but still a station wagon type, and I thought I found it when I saw a red '03 station wagon mazda.  I loved it from just looking at it and sitting in it, perfect I had decided.  Ya, and then I drove it.  It drove worse than my old car I was trying to get rid of.  Sorry, I said to the Mazda, but you suck.  I eventually had to settle with a little Saturn sedan, not my first choice but a good one.

Back, way back, in the day there were these things call Hiptops, I was still in high school and I was in love with them.  I didn't even have a cell phone back then so I was content with just looking at the pictures and playing with flash demos.  So when I decided to seriously look at a new phone, which I never ended up getting because my RAZR suited me just fine.  When I walked into the center of the mall, which apparently is cell phone central, I ran over to t-mobile and begged to see the Sidekick.  Unfortunately, I played with it and was not impressed by the OS and button placement.  I tried and I tried to really like it, but couldn't match it with the dream of it in my head.

Now, the question is, is it better to have a lot of talk about your product before it comes out and have people, as they always are, be disappointed by it, or to have iffy press and let people be amazed at how amazingly non-sucky it is?