I have done a couple of test rides on the wheels now and I like them though I couldn't swear that I could tell the difference between them and the old ones on a ride if I didn't know which pair I was riding. In terms of value for money, the old ones probably win. In terms of having best affordable wheels on my best bike, I am happy. The bike is a few hundred grams lighter, which is not a big deal for a non-racer, but 'every little helps'!
I also like the 12-30 cassette, which replaces my usual 13-29. I have small chainrings on my bike so I tend to ride mainly on the smaller sprockets. That means that I don't really notice the missing '16' which would trouble a lot of riders. They might like riding (say) 53/16 or 39/16 but I would be riding 48/15 or 36/15 instead, almost identical ratios. I have an extra high gear for long descents, and an even lower low gear than before for steep climbs.