Discover Hawaii - North shore / PCC

We would like to do a tour on Oahu that includes part of the circle island tour and the Polynesian Cultural Center as part of our 3 day pre cruise stay.

I have found one with Discover Hawaii - is this a good tour - any info or other suggestions would be appreciated.

We would take two days to do this if we had more time but have our other days booked already.

This site is so helpful in planning a trip - that's for any info!!

I see Roberts Hawaii has a very similar tour that's approx. the same time without buffet lunch for about 1/2 the price - any feedback on this tour?