Everyone knows about his strengths and we were unanimous that it was going to be a good thing to bring him into the club.
But he added: "You can see the impact he has for us".
A comfortable scoreline, it could have been even better for the Irons had Arnautovic been awarded a penalty for a first half foul and Hernandez's header - adjudged to have been marginally offside - been allowed to stand.
David Moyes took over West Ham in a state of crisis with the side inside the Premier League relegation zone in November.
Moyes has overseen something of an improvement in results but, although West Ham sit 12th in the Premier League table heading into this weekend's fixtures, they are still only three points outside the relegation zone.More news: Lindsey Vonn confirms Pyeongchang will be final Olympics, will enter three races
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West Ham Utd: Adrian, Collins, Ogbonna, Cresswell, Zabaleta, Kouyate, Noble, Antonio, Mario (Bryam 77), Arnautovic (Rice 84), Hernandez (Hugill 88).
"That's what Chicharito does if we can get him some deliveries in the box", said Moyes.
"The experience he has got and the ability on top of that, it was nearly a no-brainer for us".
Despite having not played for three months, Evra is set to make his West Ham debut against Watford on Saturday with Arthur Masuaku still suspended for the next four games for spitting. We want more ups than downs.
- West Ham have gone five games without defeat at the London Stadium in all competitions for the first time (W3 D2).
"We like all his other qualities but we've got him here to play". And with the FA 5th Round being next week, West Ham will have a two week break before facing off against Liverpool at Anfield on February 24. However, a combination of excellent goalkeeping from Adrian, disciplined defending from West Ham and some freaky decisions by Watford's front men, they were unable to capitalise.