I bought the UV filter to protect my lens (EF-S 18-55 mm). The filter can be easily and quickly attach and also with the hood there are no problems. One drawback of my photos so far I could not find. Hopefully it stays that way!
Conclusion: For the price you just have to strike. At least annoys you then not so, you should not yet be 100% strength ;-) satisfied I am, and would buy the UV filters.
