I really wanted to love these Crocs.  In fact I love most of my Crocs and live in them all spring and summer.  I got these in fuschia and the color is great.  I don't generally care for thong sandals but thought these would be fun to wear during the day and even for casual dinners on our upcoming cruise.  Now, I'm not sure I will even bring them along.  As other reviewers wrote, I too had some minor discomfort with the rear piece poking and rubbing my ankle.  It also does not sit on the middle of the back of the ankle and feels like it turns in towards the inside just off center and enough to feel weird.  Adjusting the strap does not seem to help with this problem.  If it doesn't rub at the ankle then it pulls on the inside of my toe from the thong.  Now, if I'm lucky and hit it just right, with my heel pulled slightly back to rest in the cradled portion of the rounded heel and my toe just right around the thong, I can actually go a few strides without incident.  But of course, they don't stay like that as you move and so after a few steps I am in pain and trying to grip and readjust my stride which is too much work to make a shoe feel comfortable.  It either is or it isn't.  I wear a 7.5 in regular shoes but have always been fine with a 7 Croc.  These seemed a hair large with the front just a tad longer than I'd like for a sandal so maybe the whole thing was just off to begin with.  I wore for about 3 days in a row to give it a fair chance and to break in as other suggested but it just isn't working for me.  I may continue to wear casually for very short periods but these will not be my go to Crocs.  Had no problems with the rivets so far and have been very careful to secure those areas when putting on and taking off.  Only time will tell.  Update- so I really couldn't believe I'd met a pair of crocs I didn't like.  Well, actually I'm sorry but I can't stand the original clog crocs!  All the sleek flats and my one winter pair with liner- love love love.  So I really couldn't believe how badly these were for me and I gave them another chance.  Wore them another couple of days and I am coming around.  I guess I've built up a callous on the back of my ankles and they no longer rub.  Every now and then the thong piece pulls the wrong way but for the most part these are now working for me.  Maybe they will go on vacation with me after all.  But I will be careful and wear a more tried and true pair on port days with lots of walking.  These will be great for sea days when I can run back to the cabin and change if needed.  Love the color!