Away wins over the likes of Arsenal, Liverpool and Manchester City earlier this season underlined West Ham's ability, and even in the face of an injury crisis in the middle of the season, manager Bilic proved why West Ham hired him by keeping his side on track.
The Croatian, who was appointed as Sam Allardyce's replacement last summer, has turned the Hammers into Champions League contenders in less than a year at the club, with West Ham now just two points away from the top four.
Now, pundit Tony Cascarino has analysed West Ham's season, and admitted that he has been proven wrong by Bilic, having doubted his appointment last summer.
Cascarino thought that appointing Bilic as Allardyce's replacement was a major risk, given how solid West Ham were under 'Big Sam', but now thinks that the Hammers are one of the most balanced side in the Premier League, as they can play attractive football through Dimitri Payet, and direct football with Andy Carroll.
Cascarino also told The Irish Sun that he thinks Carroll is the most dangerous impact substitute in the Premier League, and adds to West Ham's threat if they need to go more direct.
"I like what Hammers gaffer Bilic has done with his side and he has proven me wrong," said Cascarino. "I said at the start of the season that I thought his appointment was a risk. At the time, I felt that the most important thing for West Ham was to make sure they stayed in the Premier League before moving to the Olympic Stadium next season."
"Former boss Sam Allardyce was a manager who virtually guaranteed safety and I feared that bringing in the Croatian with no managerial experience in the Prem was a big risk. Instead, he has been fantastic and is the only manager in the league who has two styles of play up his sleeve."
"The Hammers can play nice passing football, with Dimitri Payet at the heart of things. But when that’s not working, they can go long to 6ft 4in Andy Carroll. I absolutely love what Carroll brings to the game as he has to be the best impact substitute in the Premier League at the moment, despite Bilic having concerns over the Englishman’s fitness," he added.
Do you think Carroll is the Premier League's best impact substitute?