Frank's apartment is perfect! I stayed a week with my girlfriend and because the apartment is split between the bedroom and kitchen/living room, it gave us our own space to unwind alone after spending the whole day together. The kitchen was also very well stocked with all the equipment you need (we especially loved the French press as we use that at home when brewing coffee). We cooked two dinners in the apartment and usually had breakfast before heading out and it felt almost like at home. Plenty of basic herbs and spices in the cupboards to cook with. I also counted 5 grocery stores within a 10 minute walk and too many bakeries to count. If you prefer going out, there are more than enough restaurants and food options all within 10-15 minutes of the apartment. And having big windows and a balcony in the apartment were wonderful to start and end the day! My girlfriend and I were regularly simultaneously on the wifi and didn't have any connections issues. The shower had great water pressure, which was nice after a long day of exploring. And the apartment is in amazing location! 10-15 minute walk to Checkpoint Charlie, 10-15 minute walk to Gendarmenmarkt, 20 minute walk to Potsdamer Platz, 25-30 minute walk to Alexander Platz, 40 minute walk to the train station, and an easy 20 minute walk into the heart of Kreuzberg. I can highly recommend Frank's apartment and we look forward to our next time staying there!