Themal Wall Coverings - are they worth it?

[ohmymimi]

Does anyone have experience of these, eg Wallrock? Are there real savings in heating bills to merit the initial cost? I'd be grateful for any thoughts/experiences.

NO.
They damage brick walls.
Cavity insulation and then turn the heating down and wear jumpers - much more effective

Thanks, Tip, I already have CWI and am posting this well swaddled in woolies, blankets etc, while struggling to keep CH off until Nov! I suspected the extra expense would not be worth it. Didn't know about potential for wall damage, though.