I'd say we had the best window in the premier league.
Chelsea: Given the transfer ban they actually had an exceptionally good window. Huge price for Hazard, bringing in kovacic and pulisic (i know he was january), shifted some dead weight. Still come out of the window worse than they were last year.
City: Good window as always.
Liverpool: Didn't really do anything...Got a young prospect.
Woolwich: Signed several good players but did it in the most Woolwich fashion possible. Enterred window with a horrible defense. Spent a ton of money on a winger who is good but not great. Spent a lot of money on a cb who they loaned back. Brought in a great midfielder...but on loan with no option to buy. Tierney and Luiz likely upgrade their defense but both are still pretty big question marks overall. Weird window. Probably improved defense with tierney and luiz, think they improved the 2nd most behind us but they spent a ton of money to get there and will have huge issues if they don't make champions league again. They were also the worst of the big 6 last year so had the most improving to do
United: Signed good players and hung on to pogba. Loss of herera will be huge, might even negate the upgrade maguire presents. Wan bissaka will help. A little bit better than last year but not much.
Think us, Woolwich and City had good windows. United imo are not better than last season. Say what you want about Lukaku but he scores goals and Herera was vital for them last season. Now they are relying on Matic and Rashford playing centrally.