Queens Park Rangers managed to keep hold of most of their key players over the summer, despite being relegated from the Premier League.
QPR managed to keep a number of their key assets, including the likes of Charlie Austin and Matt Phillips, while they also added quality to their group.
And Henry, who has been with the R's since 2013, was delighted to see so many of the club's star players stay, despite their relegation to the Championship.
"We’ve got a really strong side and in terms of the players we managed to keep, that transfer window is probably the best the club has had in the time I have been here,” he said.
“For us in the changing room to see them still here is really huge. It makes us now think that we can have a real good go, there are no excuses.
“That uncertainty around the transfer window isn’t just unsettling for the players involved. It’s unsettling for the rest of us as well.
“When there’s suggestions your star striker could go, we’re all thinking, ‘What happens if he goes? Who’s going to bang in the goals?’
“So it’s really comforting for us that they’ve all stayed.”
The benefit of QPR's transfer window has already been in evidence, with Austin standing out over the campaign so far.
The striker managed to net 18 times in the Premier League during the 2014/15 campaign, and he has quickly re-found his top form at a lower level.
Austin has five goals in his first six Championship games this season, and his clinical finishing will be crucial to Chris Ramsey's side's chances this term.
QPR have a young squad, and are in somewhat of a transitional period, but they are currently in ninth place in the table and will have ambitions of climbing even higher as the season progresses.