furnished apartments or unfurnished?

People often move furniture here or buy it here but it rarely leaves since it can be cost prohibitive to ship "used" furniture.

Very common to rent or buy furnished here.

Even some high-end homes for sale come with furniture.

I would say the majority of MLS listings are offered furnished.

You will be able to acquire furniture - both new and used easily here - it may take a few months to really get it all together - Furnished apts. come with varying quality and extent of furnishings - and you may have to pay for damages to furniture that was shoddy from day 1 in some cases.
Unfurnished generally means a stove and frig - I have found that by renting unfurnished I can offer a cheaper rent and have had all my tenants stay for many years because of their owning and maintaining their own furniture, and the comfort level that provides. Furnished apts. seem to have a faster turnover - [pack your suitcase and leave]
It does depend on your future plans as well - many 'new' arrivals will rent with furnishings because they have no idea how long they will be on island. Some of it may have to to do with the age of the renter too - it seems the younger the renter the less furniture type possessions they want to acquire. They are a lot less picky about used beds and cushioned furniture - kitchen implements, plates and cutlery are often hodge podge or throwaway products and they do not collect art, carpets, window treatments etc. in most cases.
It is truly a matter of preference and lifestyle - there are some fabulous furnished places to rent with top quality furniture that are completely outfitted - linens to crystal - the rent is usually commensurate.