Thanks Paul,
As long as the "Ring" charger is doing the job I'll keep using it, but at some point I think it might be worth getting a CTEK, I've never seen any real criticism of them.
They have a great reputation Peter but so do many others with equal or superior features, but costing less than half the price,
Maypole for example.
Having looked at the spec of your Ring charger I would stick with it, especially given its up to 12 amp charge rating.
There are many purchases in life where price to diminishing returns can be justified, by those who wish for the best and can afford. IMHO smart battery chargers are not one of them though
