I had mine done this week - with my insurance company the excess varied between £75 if I used their approved repairer, and £125 if i went elsewhere.....
...for £50 i wanted it done right, but gave the local branch of National Windscreens (W-s-M) a ring anyway, to see what he thought....
...he had done one before, was fully aware that the trim pieces and A pillar seals needed renewing, and his only concern was the availlability of the parts (and time to do the job)..... last one he did was before A pillar seals were re-made, so he was happy when i said that they were easily findable now.
As the car isn't being used at the mo, he cheered up even more when I told him he could have it at the workshop for as long as it required.
He phoned me back an hour or so later and said alll the parts (glass, trim and seals) could be with him in a couple of days if i wanted it done there.
He wasn't upset when i presented him with a few pages from the workshop manual on the correct procedure "in case he wished to refer to it" (i.e. - "Do it THIS way!").
Basically, he gave me enough confidence to give them the job, and as windscreen specialists, have probably done far more "obscure" windscreens {NO< Geoff, NOT the glass!!!!

} than many Lotus garages have done Elans.
I dropped it off at 0900 on Monday, he phoned me up at 1500 to say it was all done.
I was well pleased except for during the drive home when i kept thinking something 'didn't look right' but i couldn't work out what it was - then i realised they had put the windsceen wipers on the wrong sides - 3 minutes after arriving home, all sorted, cracking job (Pun intended!) - £75 paid to the company, never even had to phone the insurers at all!!!!!
Moral of the story - if you can't get a specific recomendation, talk to people and go with who you feel comforatble with, not just who you are told to use. (but i can recommend Peter - manager at National Windscreens W-s-M

).