We went to the RV Supershow in Tampa yesterday and all the 5th wheels we looked at had the island in the kitchen. We think that takes up too much floor space.
It all depends on each individual kitchen and how much counter space it offers. We ordered our 2014 Lifestyle LS36FW without the island. We have more than enough storage and counter space without it. Everyone loves all the room we have without it. In addition, the room we have with the slides in is great while on the road and loading/unloading. Phillip