I was in Seoul 3 weeks prior in Hongdae, and while I enjoyed my stay there, the Aloft Seoul Gangnam hotel was like a breath of fresh air so to speak and made my last 2 weeks enjoyable and comfortable. The front desk staff was really nice and helpful, and since I unfortunately dont know much Korean, their proficiency in English was extremely helpful and appreciated (I understand how difficult it is to learn a new language other than your native one, so regardless of proficiency, I am grateful)
The rooms were clean, the shower was set up in a way that I'm more used to in the USA, the cleaning staff were very nice and did a great job, overall loved the hotel. If they have a good rate and you need to come to this area of Seoul, I strongly recommend them.