Was also there last night and the track was dreadful. Both promoters have stated on the Plymouth forum that the track is fine . For me they are in total denial.
First visit to Warsaw ,paid £16 for tickets where in Cardiff the same area cost me £ 80 last year. The experience was also so much better . I know which one I would recommend if you can only do 1 Gp.
I think the lower tier tickets are sold out , still some available for the upper tiers via the bspa website to take you to the booking site. Will be my first trip to Warsaw and can't wait.