I'd just found that same link myself, Jno.
It's the overall star rating which is the best guide there, with 4 stars being damned good for wines around a tenner, so 4 stars for a wine at £4 (or even at the full price of £6) is exceptional.
Albarino is a lovely grape, which is the most commonly grown white-wine variety in Spain (apart from in the Rioja region, where Viura reigns supreme) but surprisingly little known elsewhere. The wines it produces (especially from the west of the country, as with Rias Baixas) are dry but not short on fruit.