Avon ZT5 tyres, anyone?

[Toaster Pilot]

Found these in 165/70/13 for only a couple of quid a corner more than unnamed "budget tyres" and they seem to be rated pretty well in the EU tyre labelling thing at C/C/69db - anyone had them and are they any good?

Only branded tyre in a similar price range seems to be the Goodyear EfficientGrip Compact.