Rachel's place is in a perfect spot for exploring Berlin. She's near public transit and many cool spots are a nice walk. Parking can be a bit tough if you drive (I parked under the bridge with no issues).
Her flat is very clean and the bed is super comfy. Some complain of noise but growing up in a city myself, I didn't find it to be an issue at all.
Rachel and her pooch are both great! She gave me some awesome tips on places to check out. I highly recommend staying at her place!