Decent branded, well made and nicely styled (there are some real cheap and nasty ones about). Takes SD cards and USB sticks as well as the 120mb built in storage.
(Sainsbury's description doesn't mention USB sticks but it does support them)
Auto power on/off function at chosen times to save power.
Other nice features are clock functionality allowing use as a digital clock, clock with calendar and also clock overlay over photo slide show.
Optional Auto resize feature and auto rotatation of Landscape/Portrait images.
Sansung product page:-http://www.samsung.com/uk/consumer/detail/detail.do?group=itbusiness&type=monitors&subtype=digitalphotoframes&model_cd=LP07TILSST/EN