Solid, sensible signing. Raya needs some proper competition and Kepa's a good enough starting keeper for half the teams in the league. I think he'll be good backup.
Buuuut...if he isn't solving any problems, I hope he provides some entertainment by openly challenging Arteta on the pitch like he did with Sarri because that'll be fucking funny.
Also we'll filled our ex-Chelsea quota for the window so no Madueke please