Underlay for laminate flooring and UFH

[Shell820810]

The first post on laminate flooring, popular stuff

For various reasons we are putting down floating laminate flooring.  We have had various opinions on the best underlay.  One place was trying to sell us stuff suited to UFH that was only "0.9 tog".  Mmmmm only....

 

So the most common stuff seems to be this Quicktherm at 0.35 tog, about £2/sqm

https://www.flooringsuppliescentre.co.uk/products/floor_fitting_products/underlay_insulation/timbertech/3040/quicktherm_flooring_underlay_for_underfloor_heating_18_mm_10_sqm.html

 

However was speaking to someone that stopped using the Quicktherm above, preferring this Woodmaster underlay at 0.15 tog.

http://www.laminatewoodenflooring.com/woodmaster-underlay.html

 

The woodmaster is actually slighty thicker, at 3.5mm v 3mm, so I assume might be as good underfoot?

 

Any experience of either?