OK, I've ridden to work all of 6 miles. Definitely better, but I may still go for some lower clamps, but undecided as I haven't ridden it at all for 2 weeks, so need a morning on it.
I was pretty lucky scoring mine cheap off ebay, pre-cut by 20mm each end and also tapped for the original bar ends.
Used a Stanley knife to trim the switchgear lugs off - and nearly parts of me too!
I might rotate them forwards a bit more too, was a bit unsure where they should end up.
A worthwhile mod, but on their own, not a MASSIVE difference, but probably drops your hands / arms an inch, which is more of a different feel than you'd imagine.
Will update as I get a better feel for it.