having used Moo recently - and while it is good value, the downside is the quality of the print which is acceptable for some jobs but I wouldn't use them again.
Any type that is out of the 4 colour process has a large dot grain and legibilty suffers. Therefore anything less than 12 point will suffer. Be aware.
The old adage is - 1.Price 2. Quality 3. Speed - pick any variation of 2 but never all 3