Collins has spent seven years with the Hammers, over two spells, but he has never seen the club with so much quality in their ranks as they have now.
“No disrespect to anyone I have played with at West Ham but this is the best squad I have been part of. We can probably put out two teams at the moment and competition for places has helped," he said.
“There is a good atmosphere around the training ground and everyone gets on. Confidence is high and if we can defend well, we know we have players upfront who create chances and score goals. It is a great place to be at the moment.”
The Hammers' class has been evident over the early part of the season, and has lifted them into fourth place in the Premier League table.
West Ham have attacked with pace and purpose, scoring 20 times in their opening nine games, and proving a threat to every team they have faced.
Slaven Bilic's side have beaten the likes of Manchester City, Liverpool and Arsenal, and have announced themselves as a serious contender to take one of the European spots.
The London outfit spent big in the summer, to bring in players in every department, and they have already seen the benefits of their transfer window work.
Collins has actually lost out since the new additions came in, and he has struggled for first-team appearances, but as the Wales international played in West Ham's last match against Crystal Palace, he will be hoping to keep his place for the weeks ahead.