The Oxford one's are good, just make sure they are well fitted. Putting them over some handguards gives them some extra rigidity which is essential at anything other than town paced riding. You might find they start to lift or dip on the motorway, one will inevitably go up and the other down. This is what eventually led me to get rid of mine, they became a distraction on the motorway.
They work really well around town though and anything up to 50mph, or maybe mine just needed better fitting, they weren't on my V btw.
They are best used in combination with some heated grips.