I booked a tour with them because it was discounted then had trouble paying for it on their website in time to get the discount, got angry and searched them on Trustpilot. Seeing their poor reviews I think it's best to adjust my plans and pay a bit more for a tour with a more reputable competitor.
https://www.trustpilot.com/review/trafalgar.com
https://www.trustpilot.com/review/trafalgar.com