Aluplast Energeto Neo (uPVC) and Deceuninck Decalu88 (aluminium)… anyone have experience of them?

[fatgus]

We’re researching 3G windows and have focused on aluclad timber, but came across these two possible alternatives. They seem to have decent Uw values and we like the aesthetics (albeit based only on web images) and Deceuninck in particular would appear to offer all the different options we need (fixed, top hung, 3-track lift & slide & french). I’m waiting for calls back from both, but wondered whether anyone has first hand experience of either system?

 

Cheers