As usual, free delivery. Extremely cheap, compared to what I usually pay. And its always good to have a some around. There are a variety of types on there, as well as smaller packs (if you don't use 50 in a year, remember condoms do not last forever).
I haven't tested them myself, but they appear to be tested by DX quite extensively and are electronically tested as well by the manufacturer. Enjoy.
Hope they're not leaks :)