Bilic took over at West Ham at the start of the summer, and he has overseen a period of considerable change at Upton Park.
The Croatian has brought in a number of players, while tweaking the side's playing style, and the Hammers have been a team transformed as a result.
Wins at Liverpool, Arsenal and Manchester City have carried them into third place in the early Premier League table, and Reid is enjoying working with Bilic.
"A huge amount of credit, deservedly, has gone to the manager. He has been first class ever since he started," the centre-back said.
"Slaven is a very relaxed guy and he’s good to the players. He clearly hasn’t forgotten what it’s like to be a footballer himself, which is a crucial characteristic.
"We had a slightly unusual pre-season where we were getting used to his new ideas but also trying to qualify for the Europa League. Unfortunately we didn’t quite manage that, but afterwards we had a team meeting and we said we need to focus on the Premier League.
"Most importantly, the new manager came in with new ideas that are easily understood. He’s a great communicator. He likes to get hands on in training which is good. He’s very engaging and the players like working for him."
Bilic has made West Ham one of the most dangerous attacking teams in the Premier League, with their creativity and pace going forward posing opposition defences plenty of problems.
The likes of Victor Moses, Dimitri Payet and Manuel Lanzini have given the Hammers an added spark, and the club are flying high at the moment.
Their next fixture comes at home to Norwich City on Saturday, and another win would help to lift morale even further around the Boleyn Ground.