I wouldn’t say the Rebel XS is bad. I have never used one, but my friend used to have one and she felt limited with it’s potential. It has fewer megapixels (few enough where it’s noticeable when making a large print and zooming in to edit) and she felt it was pretty grainy. But I don’t know how it shoots besides that. You can definitely read reviews and do comparisons. I know lensrentals.com has a little pro review on each of the lenses they rent out, and I believe they rent bodies also… It may have a good review or comparison. Definitely check them out.