I'd say it depends on what you feel is a value for you and your group. Last March we had one that we scored in a cruise planner black Friday sale. This year's (2/9) rental was over double what we spent last year but the value is still there for us, as a family of four with young children who love the beach.
Included is (provided you've purchased food and drink packages) all the food and drink you can ask for from the cabana menu, served by your cabana attendant, towels for your party (don't need to bring them off the ship), bottled water in the table/cooler, a safe, an electric outlet for charging devices (DO bring your own plug and cord), 4 chaise lounges, a medium couch with a chaise side, and two hard, sturdy, plastic-y armchairs. Personally I think that's plenty of room for a party of 8; it's not like you'll ALL be in the cabana at the same exact time.
Some literature states that you can ask the cabana attendant for an included speaker, which we did and was provided, but the attendant, while wonderful, seemed a but confused by the request so just in case you'd like that, recommend to bring your own. Ive attached pictures of our family's visit in March so you can get an idea of the size and seating/etc.
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