One thing's for certain - West Ham boast some of the most passionate and loyal fans in England, and they're going to absolutely love Chicharito's enthusiasm and ability to just score goals.
The former Atletico Nacional coach is also happy with Mexico midfielder Andres Guardado's transfer from PSV Eindhoven to Real Betis.
'They are crazy for football and this is what I like.
They won't take him not tracking back, covering the full-back, helping his own full-back - they will be on him so he'll have to improve.
West Ham are set on making a strong challenge for the upcoming English Premier League season, having announced the signing of Marko Arnautovic from Stoke on a five-year deal for a club-record fee, believed to be in excess of around £20 million (S$35.42 million).
Last season Arnautovic scored seven times in 35 games in all competitions, which has been about his standard return in the Premier League. Instead, he decided to sign a new lucrative four-year deal with the Potters.
The 29-year-old left United to join Bayer Leverkusen in 2015 for £7.3m. His form over the past three seasons for Stoke has turned him into a mainstay for the Austrian National Team.
Here is a selection of the best messages on Twitter.
"It feels special to me to be a West Ham player", Arnautovic told West Ham's official website. Whilst not incredible, they're not players who are unable to cope in the Premier League. The Hammers look to be making big strides in their recruitment at the moment, with Stoke stagnating.
- Cristina afirma que el Gobierno "quiere manotear la caja de los jubilados"
- Nokia 8 May Run Android 8.0, Geekbench Listing Suggests
- Nueva temporada de "Game of Thrones" logra altos índices de vistas
- Crece la investigación sobre el "Rusiagate" en EU. Con Loret de Mola
- Brad Pitt y Jennifer Aniston ¿De nuevo juntos?
- La primera Semana Mundial de la Lactancia Materna inicia formalmente
- MUD marchará este viernes contra el fraude de la Constituyente
- Two leading opposition leaders have been detained in Venezuela
- US Service Members Killed in Attack on Convoy in Afghanistan
- Anuncia sanciones contra Maduro tras comicios de Constituyente