I got the diabetic type 'Relief' directly from the mfr's site. I called, and spoke with a live, responsive human being about those 'nubs'. Before PN, I was worse than a 'princess w/a pea'! I was sure the 'nubs' would drive me up a wall and back down again. They do not! Matter of fact, as long as I wear thin socks [a whole different issue fer sure] I can tolerate the 'nubs' w/o clinging onto a ceiling..
As for delivery, the MFr said 7-14 working days...got 'em in four days. While I find I tend to wear either slippers or my 'river/water sandals' more often, The Crocs cause no problem. I DO use the 'strap' tho-to keep myself from 'walking out of shoes' as I can do...find myself five to ten feet past my shoes before I realize I've not got them on? As for swelling and 'adjusting' to the foot and all, I find that as you wear them, your body heat [which can be absent at times in the toes, etc] will soften the footbeds and adjust just nicely to your feet. Since I've ingrown toenails that docs refuse to do anything to...the toe room on the Crocs I have is pretty durn good.
IF you get a pair, tho...don't just get them and WEAR them all day at first? I find they do put your foot in a good place to walk, but I do a lot of 'compensation' in my walking so, walking RIGHT right off will result on one biig HECK of a payback in terms of foot, arch and leg cramps! An hour, two hours a day and then work yer way up to more time. I did that at first, the pains were not well, NICE?
They may not work for some folks tho..I have a very WIDE foot C-D-E, depending of fit, and I've no problem, those with a narrow foot would have to wear really thick socks, and I'm not sure that all could be tolerated.
Hope this all helps....and I have/DO see lots and lots of nurses and techs wearing them...I asked lots of them questions about them before I committed myself to a pair...Got happy answers. BTW my pair are the black? It's a discrete pebbly kind of black, not tacky looking at all. - j