Stayed for 3 nights in a Twin Room for family vacation.
Our room was spacious and has a balcony where you can see the N Seoul Tower. The usual complimentary bottled water, coffee/tea are available. Has a cabinet, fridge, electric pot, blow dryer but no microwave. The weather dropped to 2°C in Seoul during our stay and we felt that the heater was broken since we kept adjusting it but the temperature remained cool (not cold, though). We did not complain about it since it wasn't too cold anyway and the beds were warm.
The bathroom was clean and has a bathtub, automated toilet bowl, and toiletries.
The hotel is close to train stations but since we were travelling with a child, we mostly used taxis. There are taxis stationed outside the hotel almost all the time and the taxis we hail going back to the hotel are familiar with PJ Hotel so there wouldn't be a problem getting back despite the language barrier. The hotel also offers free shuttle buses for 2 routes, which we also tried. We were waiting for a taxi when the hotel staff outside suggested we take the bus since it can drop us near our destination. After we got off the bus, we started walking towards the opposite direction. The driver called our attention by honking and pointed us to the right direction before driving away.
Aside from the cheerful and helpful mister outside the hotel, who helped us hail taxis and helped us tell the taxi drivers where we were going, the hotel staff service was okay. We didn't have a bad experience and didn't have to complain about anything but the service was too professional, it lacks warmth (which I craved since we stayed in a smaller hotel in Insadong with warm and welcoming staff before Hotel PJ).
Our hotel booking did not include breakfast but we walked in to try their breakfast buffet. Price is 15,000 KRW for an adult hotel guest. The food was okay but I think the choices are a little limited.
There are ATMs just outside the hotel in case you need to withdraw. There are also several shops just outside the hotel, including convenience stores, coffee shops and souvenir shops.
Security is good. You need your key card to access the elevator going up to your hotel floor. In case you arrive early or check-out early, they have a dedicated locker room for luggages, which is free for 12 hours. Each locker is password protected.
Overall, the hotel is great. It's spacious, clean, secure and has a convenient location. Though you can get a hotel at better location for a cheaper price, the size of the room and the amenities make up for the price difference. Complaints? Only that there is no microwave in the room. Will stay again? Definitely yes.