Speaking to reporters, Moyes said, "His pedigree over the years has made me feel he's a player I'd like to have at the club. For some time he's been a mainstay of the England national team. He's someone who has been a really good player. The move to City hasn't worked as well as he would have liked."
He added, "This time a couple of years ago we got Jesse Lingard, he really helped us. I'm hoping Kalvin can have a similar impact as Jesse had. Everybody has something to prove. Jesse had something to prove and Kalvin has as well. There is a big competition at the end of the season where he'll be hoping to be in good form.
"We're talking about a boy with really good character. I heard Pep Guardiola's comments about him and I would agree with those, having had him here for a week now. We want to see his footballing ability now. I think he's got a chance now to get himself back on track. We've brought in another England international to our squad and that's a big plus."