Couldn't agree more, the thing with the Ring is it can clout out @ 12A or you can set it to max @ 2, 4 or 8 and the repair/pulse and trickle charge functions work really well.
It charges the 110Ah battery in the landy quickly as well as topping up the leisure batts I use for my clay traps.
It can also be used to check the Alternators output.