I work for Quicksilver, i dunno which sites you are all goin in but we certainly dont let people reserve machines for over 2 hours on our site like some do, we have a max of 30 mins and that is only allowed once a day, for the hoggin machines yeah i agree we do have a few customers in particular who can sit and play 3 machines all day but if they choose a popular machine and we have a few customers waiting to go on it we will ask them to give one of the machines up, and as for the tokens, yeah we run out once a week on them, not when a particular person comes in.
Whilst certainly good in that you are willing to be public, and speak out for Quicksilver, as you say, you can only speak for the site you work for.
Unfortunately, from my own experience of the three sites in Derby, it is a very common occurrence, though the site located next to Zanzibar, is the better managed out of the three.
Now this is in stark contrast to the JEM group (James Mellor), who have several sites in the Nottingham / Derby area (The two in Long Eaton area, I often visit), where the service is first rate, and none of the aforementioned stuff happens, with a max of 10 mins for reserving a machine.