I'm giving the first 5 chapters of my novel to one of my beta's tonight. I have multiple POV's separated by chapters all in first person (4 total).
Now before you start screaming (heck, part of me is screaming), I did this because I realized that I needed information to be apparent to the reader that the main character doesn't get. So I was all prepared to rewrite the thing in 3rd person limited for those four characters. My then current set of beta readers read what I had so far (7 chapters at that point) and raved over the POV choice. They told me it made the novel.
Now let me be biased and say I like my novel, but I really I don't believe them. So I've been revising and fleshing out the first set of chapters before continuing on. The first 5 chapters represents all the POVS. I have notes on switching to 3rd person but have yet to do so. So, to this new beta I've made the what I need clear:
Do you like the story?
Could you handle the POV change in first person?
Could you differentiate the characters from voice?
Would you feel the same if the story was written in third person?
Don't worry about grammar unless it really bothers you.
The difference between this and my other beta readers is education. She's been through the same workshop hell college I've been to, so I know she'll be frank. Where the others could only really tell me what they liked and didn't based on what they usually read.
My point (I knew I had one) is that a beta reader should be chosen for what you want to get. I give the story to different people based on what I know their ability for feedback is. It seems to have worked out so far for me. Another example is a vampire short I wrote. I mangaged to impress a literary crowd & some vampire lovers (separately). However, I havent' been able to find a market for it. (Still waiting on that one). So I know betas aren't sure bets either.
I guess I'm just skeptical.