Pros small, comes with case...no batteries required
Cons no real bass and volume very moderate
Summary I never really expected to get too much out of these portable speakers to start with, so I wasn't really dissapointed when I heard them. They sounded exactly as I thought they would. They are not very loud, but good enough for the beach or camping or somewhere where where mit is just you or another couple sitting around shooting the breeze with some background music to fill in the awkward silences.
They look good and run off the battery in the phone (I use a K790a with mine). I never noticed any dramatic battery drain at all using them.
All in all they do what I wanted them to do at the price that I wanted to pay for them.
Good value for the price IMHO