David Moyes inherited an incredibly difficult job when taking over as Hammers boss, with his side deeply entrenched in a relegation battle, and a group of underperforming prima donnas amongst his group of players.
The Croatian did make one superb acquisition though, one who could prove to go and and be a key figure for the Hammers this season - Arthur Masuaku.
The 24-year-old was originally signed by Bilic as competition for Aaron Cresswell in the left-back position, but he has been utilised further up the pitch by Moyes, and has been quite sensational for the Scot, since his arrival at the London Stadium a month ago.
Masuaku joined West Ham for just £6 million in the summer fo 2016, and if he continues his fine run of form, that fee will look like mere pocket change.
The fleet-footed utility man has shown some superb skill on the ball, blistering pace over short distances, and has proven to be a great outlet for the Hammers when they have found themselves under pressure.
His performance against Chelsea summed up what he is all about. He was a constant threat down the left hand flank, but was equally as important for his side defensively, showcasing real discipline when needed.
And Moyes must be absolutely delighted to have Masuaku amongst his ranks.
Bilic left the his successor with some real dross, that cannot be argued, but the Scot will be counting his lucky stars that the Croatian brought the 24-year-old to the club 18 months ago.