Thanks HamburgAround!
The lounge showers are indeed serviced by very friendly people and are clean.
I was only asking as I remeber the rather memorable (negative) experience i had in DUS when arriving from EWR trans-atlantic flight and making connection to TXL. And you are right there is a wait but i guess I was lucky.
MUC Senator lounges are still the best as far as I can tell. No wait very nice design, quite similat to one at First lounge in FRA (I mean design of shower rooms) Such a little thing and makes people - like me - so better.
And BTW EWR new SEN lounge is a little bigger and of cource as being brand new is new. Still food offering at adjucent SAS lounge is better.
Sorry for lame pharselogy - flghting jet-lag.
all the best!
L