On the ZX6R I only ever used a Dynojet one and it felt really good. 1st to 2nd was a bit rough, which is fairly common though, but other than that it was really smooth. On other bikes I have used Bazzaz and Annitori but I didn't like them quite as much. Most of my bikes have had Dynojet QS's. No complaints at all.
2007 ZZR600 (sold)
2006 CBR600 (sold)
2010 1198 (parted out across North America)
2013 CBR500R (sold)
2009 ZX6R (parted out across North America)
2015 R3 (sold)
2018 Ninja 400 (race bike)
2013 RSV4 (race bike)
April 2016 and April 2017 6OTM winner!