Complaints so far: the icons are quite small and light grey, which makes it hard for an older person to read. Some of them are also rather obscure-looking. In addition, I'm trying to figure out the functionality -- for awhile, it would only allow me to modify the caption to my pictures -- which I wasn't planning to do, it was just the only thing it would let me do.
Case in point: this comment has just erased my previous pictures and caption. They need to fix this problem quickly. If the only thing I can do is overwrite previous postings, it'll get real old real quick.