The ones that I have seen were not resistant.

I'm a real Rainbow Sorbet fan! It has been wonderfully hardy for me here in zone 5 and is ALWAYS in bloom during the growing season. The leaves are very glossy and quite disease resistant in my garden, compared with its neighbors, although not disease free (I do spray every 3 weeks or so). I'm planning on buying a second one I like it so much. Its parents are Playboy and the Buck rose Earthsong, and it has inherited Playboy's heavy blooming and Earthsong's hardiness.

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i bought this rose last spring and was impressed with the blooms and scent. it went through a bit of a rough time though, but i believe it was due to being transplanted twice in mid-season-(i know...) it did get a little die back and was a little slow to start this year. but it is making up for lost time. it is a very fast rebloomer and looks like it should be resistant to most diseases . nice apple fragrance too. BTW i had a picture perfect flush come out the morning of the hottest day we have ever seen in vancouver(42 celsius), and by the afternoon, every beautiful bloom was completely fried and crispy. (it is in direct sun).

My Rainbow Sorbet has never done well. The first year the blooms were actually quite ugly. Last year, the 2nd year, they looked better but the bush was still not that great. This year it barely survived the winter. I should shovel prune it, but I'm still waiting to see if it survives.

Rainbow Sorbet is in my top three. It's a nonstop bloomer, stays a decent size, and has no disease problems in a no-spray bed. Every blossom is a different color so it truly lives up to its name. We had a really cold winter following the horrible gardening year last year, and this two-year old bush is so full of blooms right now you would never know it wasn't grown in a greenhouse. Excellent plant. I think a whole bed full of this one would be gorgeous. (We had 40mph winds today and this one still looks fresh.)

I just planted a bareroot RS last month and it has 8 buds on a super vigorous and healthy bush. One of the blooms is open already and it is gorgeous. Yellow base to the petals with deep red outer edges and a nice fragrance. The other blooms have dropped their sepals and will be open in a couple of days and it will be quite a spectacle.
It looks to be a real winner for me. I am glad to have it.
John

Trustmissy, I'm so sorry your Rainbow Sorbet isn't behaving for you. Sometimes you just get a plant that isn't very vigorous. Don't give up on this wonderful rose - you might want to try a different Rainbow Sorbet and see if it does better for you. I grow over 180 roses, and it has been one of my healthiest and one of my best bloomers - so I know it's worth a try. I've had some roses (Sunsprite for example) that everyone raves about and mine just sits there and sulks. I've even tried moving it, but the pouting continues. I'm sure it's not the cultivar, Sunsprite, but rather that particular plant.