Donot buy if your dslr have a pop up flash. This wont give much better result than your pop up flash. If you are a dslr user, looking for first flash experience go for 430exII or other low cost compatible models.
It is strictly for compact camera users.Not for DSLR.

Easy To Use

Canon 270EX II (7.2 oz./203g with 2-AA eneloop cells, 4.3 second measured recycle time, ISO 100 measured guide number 17 meters/56 feet at 28mm setting, 28mm/50mm zoom head, about $170 new or about $120 used if you know How to Win at eBay ).