Hi Sharlene,
For ubud, I'll be staying for 2 full days there. Generally, ubud to me is a better place than kuta or nusa dua. cos you get to see the more 'real' side of Bali compared to Kuta and Nusa Dua.
Nusa Dua is more of a 'man made' place where the roads are nicely paved and grass cut properly. something like our sentosa...i think you get what i mean.
If you just wanna see ubud, touch and go, half day is definitely possible. Maybe just shop at Pasar Ubud or the nearby shops lor...not much time...
if can spare one whole day, that will be better of cos.
If spend half day, go early in the morning...weather is better too.
For kuta, shops do open late. I remembered i was still looking ard at about 9+.
even if shops do not open, the night life is still active then. Maybe you can go for a drink leh..there are quite nice looking (chic) pubs ard...Can look at the lane where the bomb took place. got a few there...
When everything else fails, you still have Hard Rock...heheh...
When you going?