I don't know what the reliability thing is about. PR1.1 and 1.2 really helped with that, but the only major bug I had was that account settings not being remembered, which was solved by a re-flash. Smoothness.. well I'd say for the most part its smooth, when I start hammering the CPU then yeah, but I don't mind that if it means true multitasking. I just wish the N9 came with a dual CPU, but that would also mean a larger battery requirement.

If they ever do manage to build another Maemo/Meego phone, it would be cool if they created a higher clocked core with a lower clocked core and offload (affinity) most of the system/UI tasks to the lower core and shut off the higher core when not needed. Maybe lots o' ram so more stuff can be stuffed in RAM and not reside on "disk"