I've played at merseyroad and overkill, by far the two best fields in the hrm area.
Review:
I thought that the field was okay, maybe a little more bukers wou;d be nice, and being able to bring your own paint would be good to. THe balls there were some sorta white stuff that was as hard as marbles, and it wasnt cheap either. Overpriced and the rentals were not good quality, but it is a good field for a family day or something.