The press, the internet, the drum community… all of them regarded the Mr. Muff really with favour. Here are some reviews and very nice statements, most of them in german.
Take a cup of coffee and read the reviews of the german drum magazines:
PDF Sticks Ausgabe 05/2015
PDF drums & percussion Ausgabe 04/2015
PDF DrumHeads!! Ausgabe 04/2015
Daniel Jakobi is fan and buddy from the beginning: PDF Daniel Jakobi
Also in the web you can find some very nice articles.
Dave Kobrehel is a good author and shoots a lot of amazing videos:
http://www.jazzdrummerworld.com/drums-und-percussion-news/muffkopf-der-vintage-sound-fuer-die-bassdrum/#.VxCi93qRiSo
http://www.jazzdrummerworld.com/jazzdrummerworld/drum-workshops-material-fur-drummer/workshop-hip-hop-golden-era-grooves/#.VxCk23qRiSo
An english review by one of the biggest drum sites in the UK:
http://mikedolbear.com/story.asp?StoryID=4267
Right before the gaffer tape: the Muffkopf!
https://www.bonedo.de/artikel/einzelansicht/8-praktische-helfer-fuer-den-alltag-eines-drummers.html