Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great portable scanner - especially for Mac

Great portable scanner - works wonderfully with DocumentWallet software on Mac. Easy setup (need to download the Mac driver from the Pentax site though) and the scanner worked flawlessly - scanned 150 pages tonight with absolutely no problems. Unlike other scanner drivers, the Mac drivers worked well - no lockups, no program crashes. The same cannot be said for other Mac scanner drivers, especially Epson. Nice carrying case too.