The guys doing the commentary are knowledgeable, fun and interactive, but unfortunately the sound systems on the buses we travelled on was poor, with dreadful background white noise and the sound of a hundred horses running from the knackers yard, some of these buses need to be refurbed or retired, the wind from the microphones was shocking, is it really too much of an expense to put a muffler in them? After all people are paying money for a tour and we were passing so many things that looked interesting but we had no idea what was going on, the buses advertise free wi-fi, it’s very hit and miss. The buses as reported in other reviews are truly filthy, I know they aren’t going to be glistening, but my hands were filthy just from putting in my headphones (as reported I needn’t have worried getting my hands dirty). Bus schedules are not adhered to, even the 1st bus of the day was late, traffic I know, but are the paying passengers so unimportant to the company? People are on holiday but I personally hate sitting around 15/20 minutes waiting on a late bus.