Cracked windscreen - anyone in uk with experience of National Windscreens?

[Whitey]

As per title, car insured via Adrian Flux, through LV broker division and National Windscreens is their glass replacement company. They are talking about 3rd party glass, not Lotus supplied, and said they will fit it at their Bristol depot. I would prefer it to be done with the assistance at least of Rybrook Lotus, just wondering if anyone else has used NW before?