Hi. We stay at Coral Estate, where a variety of villa rentals are available. We like Category 3 Las Verandas villas up the hill from the Habitat hotel/Diversity dive operation. Three air conditioned bedrooms, veranda, washer & dryer, etc. the whole villa is very comfortable, views to die for, private small but adequate pools. Twice a week cleaning of villa and pool, all linen and kitchenware included. The price depends on the number of people (1-2, 3-4 or 5-6) staying, and it gets pretty cheap when you are 5-6 and sharing costs.
The restaurant at the Habitat hotel has greatly improved since last year, and makes for an easy option if you don't feel like cooking. The Centrum supermarket in Piscadera is excellent and prices are quite good for quality products from the U.S. and Europe. You will save a lot of money over a month by having drinks and nice delicacies versus always heading to a restaurant (the next closest is Daniel's Landhuis, about 10 minutes away, and excellent).
Shore diving is easy (in Curaçao, you do need to rent a car to get around). At Diversity there is an excellent shore dive right off the dock that leads out (with a guide line underwater) to a superb wall that we do almost everyday, and nearby are Cas Abou and Porto Mari beaches to shore dive from. It is very nice to not have to race to get on the boat in the morning, and a shore dive tank runs you only US$ 8.50.
We like it so much (we live in Rio de Janeiro, and that is a lot of travel to get there) we have gone back each year for five years running--and are planning to do a two or three month stay there starting mid-December 2011. For any long stay, a villa beats a hotel hands down. Plus, you can invite an extra couple to join you for a week or two!
Coral Estate's website is www.coral-estate.com
and has a link to the Diversity site.