I was very critical of the chaos at Heathrow Terminal 5 when it opened.
I had a chance to look for myself today on my way from Steamboat to Johannesburg. Things seem to have settled down and to be working as the should. My baggage made the transfer and my flights were on time.
I was surprised how big it is. It's actually three separate concourses.
The British Airways first class lounge is a big improvement on the one at Terminal 4. Much larger, the wi-fi is finally free and it has showers. Not as nice as the Qantas first class lounge in Sydney though.
However the transfer from Terminal 4 takes forever. In a straight line it must be about two miles. But the route the bus takes seems to go around the airport about three times!