The Treo 650 is my current primary mobile device, and in order to carry it everywhere I go I needed to find a case that allowed me to perform all functions without issues. Sena Cases came up with a unique design where the flip-cover of the case actually flips down.I think the case is fantastic. It carries 2 SD cards, business cards, stamps, etc, fits perfectly and is well made. I've grown to like the flip down 'cause it's very easy and quick to open, provides support when I type, and can provide privacy when I talk - some times I use it as a privacy screen during business conversations. And best of all is the customer service.