As a diamond frequent guest, I received only one category upgrade from standard to standard river view, either one or two floors below the club lounge . Now I realized they also have bigger premium rooms with lounge access (34m2 vs 40), I don’t know where they are located.

They seem to have only a few suites, every time I checked the day of check in, they had only a few left for sale. You may want to use suite upgrade certificate here if it matters to you.