I've got an S5, bought it before I bought the N900. Its not fragile at all. Battery life is pretty amazing, and performance is WAY up there for a pocketable PC (better than my oqo model 02, but not as good as my late sony UX 280p). It runs windows 7 with compositing quite well, though the drivers are still a bit immature for the touchscreen. Only very very recently has anyone been able to create a utility to turn on the SDIO devices (wifi, bluetooth, 3g modem), so I still haven't tried that yet. Nice device, however between the N900 and the S5, I find my N900 more useful.