Jason Bailey, who reviewed Side by Side for DVD Talk, had the following to say about Keanu Reeves:
…he’s a surprisingly credible interviewer–a good conversationalist, he’s warm and engaged, and gets into the spirit of the thing admirably. …He also gets some great bytes out of his all-star cast…
In closing Bailey says:
The questions asked in Side by Side are vital, timely, and pressing for cinephiles; for the general audience, maybe not so much. Kenneally’s documentary might have been a touch stronger had it embraced its inner egg-head and worried less about leaving out the casual moviegoer. As it is, though, it’s brisk, lucid, and a lot of fun.
The entire review can be read at the link above.