Originally Posted by tedkarma

Get your baht at the airport. Though there is some disagreement - in Thailand the bank rate is the bank rate - no matter the location. Most exchange places will be happy to give you small change too - so ask for it.

Best to NOT use credit cards - use cash. Thailand is safer than "back home" and carrying a bit of cash about is not a problem. Just be discrete with it.

"Decent" spas are everywhere - assume that most are decent. Where are you staying? Phuket is a big island and it is hard to recommend somewhere without knowing your location.

Only my opinion, FantaSea is mediocre at best.

I am not sure that Phi Phi is worth the visit - I would, personally, probably prefer to just hang out on a beach and relax. But, that's just me!

On Phuket, you can feel comfortable almost everywhere. Go, enjoy!