Original review:  I was very satisfied with these shoes.  I have major flat feet problems and had recently developed lower back problems.  I couldn't find a pair of shoes that supported my feet well enough to keep them out of pain for more than 30 minutes at a time.

Then, I found these.  I started wearing them in June and they were fantastic!!  I found myself pain free for the first time in several years.  Even my back felt better.  Being on my feet all day was no longer a problem, and exercise was much more comfortable.  I looked for reasons to walk around in them. I was so pleased with them that I convinced my sister and another friend to buy some.

In the past week, however, I noticed my right foot was hurting again.  I assumed I had not been tying the laces enough to be supportive, but today I realized the real culprit -- the right shoe has gone flat.  No more big bubble air pockets to support my foot.  The left shoe is still intact, but the right one has no chance of recovering.  It isn't only flat, it is actually concave now, both the rear and the front bubbles.  Very disappointing.

For the 6 months that they lasted, they were great, but I don't know that I would trust them again.  I got my pair at a great discount, so 6 months of comfort may have been worth they price, but I don't know how long another pair might last.  I've written to Reebok to see what their position on the flat is, but it's too soon to know.

Note: I did see a few reviews on other sites today that talk about these shoes occasionally going flat, so this isn't not an isolated problem.

UPDATE 02.01.13:  Amazon was kind enough to replace my flattend shoes with a new pair, at no additional cost!  I've now had the replacements for over 1.5 years and LOVE them.  My feet no longer hurt daily, and these shoes have helped my back too.  I have a black pair that I use w/jeans, and am now buying extra pairs to replace my current white ones whenever they wear out.  Reebok doesn't seem to make them anymore, so I need to stock up before they disappear.