I own several Susato whistles as well as the Woodi set (C and D)

Some of the Susatos are fine, but others are virtually unplayable (For example, the Oriole Bflat, is very unstable), but I prefer the clearer tone of the Woodi (if you like chiff, you might want the Susato; if you like a crystal clear tone, you would probably prefer the Woodi)

If the C whistle were as good as the D, I would have given 5 stars