We had to wait a long time before catching buses. Also, we purchased fast track tickets to the London Eye only to find out that we were not able to "cut to the front". The fast track only got us priority for tickets to stand in the general line. When we tried to access the fast track line, they told us this was an ongoing problem with this bus tour. Would suggest going with a different company.
To reply as a company, please log in to your business account.