It is very stable but a *little* laggy at times but not so much that its annoying. Also batt life is really good so as far as I'm concerned, its good enough for me
I guess the slight stutter at times is due to the frequent switchover to the lp-core in the tegra 3 soc. I have noticed it happens around ~ 475mhz mostly which sort of makes sense as the lp core is designed with a max clock of 500MHz. The stutter doesn't occur at higher freqs. This is also maybe the cause for the increase in batt life.
Oh yea, I checked it in terminal by:
watch cat /sys/kernel/cluster/active
G: General cores
LP: Low Power core
Was running music and pulling the notification bar up and down to force higher clocks. Music sometime stuttered @ 475mhz when G switches to LP and vice-versa.
Honestly this is a crude test and there may also be issues due to poorly optimized drivers(thanks nvidia!).
Just my 2 cents.