I don't think you've spent £150m (or whatever it was) that well either. I think that will tell in the league table at the end of the season too.
The criticisms aimed at United's spending have been "you didn't need player X you needed player Y" but my argument is you can't sign player Y if he isn't available.
LvG knows full well our strengths and weaknesses and I fully expect he will continue to address these in the coming months.
As for our current business?
Shaw looks a good young player in a difficult position to fill. Premier league proven.
Rojo had a very good world cup and a solid debut for United. A centre half, which we needed, and the ability to play full back.
Hererra looks like the type of player we have needed in the middle of the pitch for sometime, an upgrade on Cleverley/Fletcher/Anderson no doubt.
Blind I know less about but another who had a decent world cup and promising debut at United in the PL in another position we have struggled to fill.
Di Maria is a fantastic player and great addition to the squad in a position we have needed to improve upon since Ronaldo departed. Looks superb also.
Falcao is another top player who hasn't really featured yet. Loan signing but one you'd be mad not to take up.
Obviously we both don't know who was available and who wasn't but when you consider we have signed two defenders, two central midfielders a winger and a striker I think it is unfair to say we could have spent the money better in other areas. The quality of player we have brought in looks far more than that of Liverpool currently. Real international pedigree all round.