"Working performance is mediocre."
Pros
Scan results are good so far, machine is lightweight and set-up is easy.
Cons
Anonyingly paperfeed trouble and/or paper jams! Therefore the 50ppm is a wrong stated fact or misleading advertisement.
Summary
The technical mishaps makes this scanner actually overpriced for a good working flow. The reason for purchase was to set-up a digital library but the job became more laborious closely followed with great annoyance.