Yes you said it all Bleu Eyeballs, the Kriegas could not be easier. Now that said I don't think there is or will be anything bad about them, I am thinking they could trap moisture, but time will tell. I put them on last week and will try to have a look under them once and awhile to look for anything growing ...
Kriega suggests that you remove, clean and re-lube often. I've been using a WD-40 like lube, after cleaning the inside of the boots, and then re-installing them. Easy to do, and minor time involved. 10k so far and easy with no noted problems.