The entire discussion in this thread will be like,
ChipMixer campaign participants : - ChipMixer
BestMixer campaign participants : - BestMixer
People who don't ever mix coins : - ChipMixer [I agree with them because ChipMixer has been around for a good time and they are already more than famous on bitcointalk as compared to bestmixer]
You are right and that's very logical. I think it will be nice to see opinions from others who aren't participated in their sig.
OP personally I can highly recommend this two: Bitblender and chipmixer, they are both amazing, bitblender is on game for years, the most older one I can remember is cryptomixer and they really have up to 2500 bitcoins as they clain because it was really verified but because of this verification, don't think they are very safe for your privacy, otherwise they are trustworthy.