Is upgrading to thermally efficient uPVC windows from a company like Hadleigh Glass actually worth it for reducing energy bills?

Hey there!

So I’m seriously thinking about swapping out my ancient, drafty windows for these thermally efficient uPVC ones from Hadleigh Glass, but I’m torn. My heating bill keeps climbing, and I’m sick of feeling like I’m basically warming the whole neighborhood. The sales pitch sounded amazing, but you know how that goes. Has anyone here actually made the switch? Did you notice a real difference in your bills or is it more hype than help? I’m trying not to blow a chunk of cash on something that won’t pay off, so any honest experiences or advice would be awesome.