Agree completely.
I was impressed with the "customer experience" (for want of a better way to sum it up)... particularly in terms of getting in and out of the stadium.
The PA got on my nerves, not due to the sound quality, just due to the desire to squeeze some music in at all costs.
The food prices are astronomical but you know that in advance so get some food before or after. Simple. £4 a pint is roughly what you would expect to pay at most premium sports venues and is not much more than many pubs.
As to whether it was all money well spent.... I'm not sure. I think the Millenium stadium was uncommonly cheap though and comparisons between now and then are not really like for like. For starters the price of steel went up massively over the last few years and the cost of finance is obviously higher now also.