Didn't enjoy that much. Put in about 10 answers, and didn't think any of them were the Special clues. Turned out some of them were, so all my crossers were wrong.
Having filled in the grid there are still 4 or 5 clues, which I don't have the foggiest idea how they work. I guess I'll find out on 225 next week.
I think it would have been fairer, if the setter had said, for eg, all Across clues are special, Down clues are normal. Then at least you know what you're dealing with.