We've bought a number of chorusonline arrangements. They are good value and very singable.
Strengths
Like that they come with band charts, audio tracks and a separate SATB only score.
Improvements or suggestions
Instead of one pdf of all parts and instruments it would be good to get them as separate documents. Sung tracks! More arrangements. Selection is too limited.
Reply ChorusOnline.com:
Thank you for your compliments !
Multiple PDF files = more work = less arranging
Sung practice mp3's: This is too expensive.
More arrangements: We're doing our best !
ChorusOnline