Uncle DaveO, no complaints here! If you buy a half pint glass it won't hold any more, if you buy a pint glass with a line half way up the staff invariably* give you a bit extra rather than risk you moan that you've had short measures. The bug question is rarely an issue because real beer comes out of real barrels with a tap on the end, not sparklet pipes that go into the bottom of your glass.

*invariably when there's festival staff on - students, part-timers - gimlet-eyed landlords would rather drown themseves in the mash tun than give you a freebee-r.