Recieved 2 sets of these at £5 each. The gels have no indication what they are supposed to correct for, which is unhelpful. At this price it was worth it just to play with lighting in general. For more serious use I would look elsewhere.
The sheets were quite scratched and marked which may annoy some (that might be specific to the supplier I bought from, who knows how they stored them etc) but as they are lighting filters and not optical filters it will make no difference to the photo results at all.