It seems to work OK for me if just loading and copying a picture or two, but when making an album or changing the order of photos and adding titles, as I've been trying to do with an album of my kit car construction, it just bogs down, and changes only seem to work intermittently.
It also changes/pops up to a gambling site after starting loading, although this can be closed and doesn't happen again. Occasionally it'll pop back to the start page with links to various themes or other albums, and I think the commercial side of the site is getting preference over the 'free user'.
I've been offered paid use to avoid pop-ups, but who pays for sites like this these days??