on 19 February 2015
Having used Shimano UN54/55 bottom brackets for years, I have no reason to change. Yes, they are slightly flexy compared to the stiffest of the BB30 or other recent alternatives, but these go on for ages without replacement (or adjustment: they are sealed), so buy one and fit and forget for the next 3000+ miles.
on 9 October 2013
I needed this for my wife's 35 year old Raleigh Wisp cycle, because the original bearing was beginning to creak. It arrived on time P&P foc; unfortunately the package contained a bicycle bell. A quick phone call and the correct item was despatched immediately. I had assumed, wrongly as it turned out, that the kit would include a pair of bolts to hold the cranks on; the original axle had male ends. Another quick phone call and these arrived foc the next day. I've not fitted it yet, but it feels very smooth running. P.S. I wasn't asked to return the bicycle bell.