It may be a good choice if you don't mind the 30 minute (4GB) limit per clip.
"Three Recording Sizes Full HD Video is captured at 1920 x 1080 resolution at 30p (29.97), 24p (23.976) or 25p frames per second, for up to 4GB per clip. Videos are saved as .MOV files and can be viewed in Full HD with HDMI output. Other recording sizes include HD at 1280 x 720 (50p/60p (59.94) fps) or SD/VGA at 640 x 480 (30p (29.97) and 25p fps) "
You might want to find Magic Lantern firmware, which adds loads of video camera functionality to specific DSLR’s: http://wiki.magiclantern.fm/faq#what_is_it
The firmware is available for the T3i. "The Magic Lantern firmware is distributed with NO WARRANTY and NO GUARANTEES are provided. It might work. It might not. It hasn't destroyed any cameras yet, but who knows."