Canon 55-250/4-5.6 IS
Excellent little lens! I just sold mine because of disuse (but the 400D I used it on has been replaced with a Sony NEX).
Yes it's a good lens. I have messed around with quite a few starter telephoto lenses over the years, and this is the only one that does not disappoint. It's no L lens, but it's decently sharp optically. Just stop down a little when at the long end. The 5x zoom and low weight make it a great choice for lightweight travel, hiking, and other uses in strong light. I have a 2'x3' canvas wrap printed from a photo taken with this lens, and it looks like it was taken with far more expensive and bulky gear.