Not sure what gate you are arriving but if it is from the US....the UA RCC offers nice shower suites and is adjacent to gate C2.
However, arriving at 6:30 a.m. on Sat. 10/22, there was a 90 minute wait. Luckily, didnt have a connection until 11:30.
Food offering in the RCC sucks and is quite crowded.
After the shower went to the non-Schengen B LH SEN. While not a newly renovated design, old style deep leather chairs were comfy and the food offering was good - albiet strange for breakfast (at least to an American).