We are going this September tonCardiff and will not have a car. There are several companies that offer one day tours. Any recommendations from someone that has taken one?
Don't know which companies you are looking at but these 2 have excellent reviews:> https://www.wherewhenwales.com/wales-day-tours/
https://www.seewales.com
Suggest you google the name of the companies + tripadvisor & up will come the reviews by those who have done the tours.
We haven't taken it yet, but we are booked for a seewales tour in September.