I read the review above and just wanted to give my experience of booking our wedding with Thomson as it was completely the opposite of the above. Mrsf2b2012 I'm not trying to say anything against what you wrote but I only thought it fair to share my experience too.
We got married last year in Sorrento and our holiday and wedding package was with Thomson. The initial booking of the holiday/wedding however was actually with Thomas Cook travel agent (store) but holiday and wedding was via Thomson and we purchased most extras with them too in addition to arranging our reception venue.
In terms of the wedding coordinators based out in .sorrento they could not do enough for us during both the run up to the wedding, our arrival in Sorrento, the wedding day and the after service. We had some dealings with the Uk wedding team (although not a great deal) and on both occasions they provided a very good service and answered everything in a timely and nice manner.
I'm not sure where you're getting married but if anyone is considering Sorrento I would 100% recommend Thomson due to the excellent resort based wedding coordinators. Marissa was a star! People's experiences may different depending on resorts/countries.
Good luck everyone x