(reposted comment with correct formatting)

>Might as well just go with the simpler Approval voting... It's simpler, and
>more effective in my experience.

I partially agree. The most effective strategy under Range voting is to
always vote max or min score for each candidate that you think is a real
contender to win. Any other vote could be considered a partial abstention.
If the voting instructions are poor or minimal many voters will accidentally
partially abstain which will understandably make them angry. But if the instructions
are well written then I do not think that this will happen to a significant degree.

I like Approval voting but I see allowing partial abstentions as being a small improvement. I don't like the idea of encouraging frequent accidental partial abstentions so my support for Range Voting is very sensitive to the context and voting instructions.

Some more of my thoughts on this:
  http://allaboutvoting.com/2008/01/07/our-voting-system-is-a-loser/

See also the Range Voting advocacy site's comparison of Range vs. Approval and make up your own mind:
  http://www.rangevoting.org/rangeVapp.html