Personally I think they are the best ones. They fit without drilling, look good in light smoked colour and do the job. Pricey maybe but excellent quality.
Givi's are good... finger tips get a bit chilly still. Wunderlich do some now that are very similar to Givi but also has small lip underneath which look pretty neat (see Nippy Normans).
I have Givi hand guards extender. They look good. Haven't had the opportunity to ride in rain yet so can't say about that. But they offer decent wind protection to the hands.