Which branch is good for Botox?

I am looking for a clinic in Gangnam to get Botox, but there are so many reviews that it is actually harder to choose. Since many of them look like advertisements, I would like to hear the experiences of those who have actually received the treatment. As this is my first time, I would prefer a place that provides thorough consultations and naturally adjusts the dosage to suit my face shape. It seems like Gangnam clinics frequently hold promotional events, so I am concerned whether it is okay to choose a place just because the price is low. I am curious to know what was good about the clinics with high patient satisfaction, and whether the consultation atmosphere and the procedure were comfortable. I would also like to know if there is a short wait from the appointment to the treatment, and I would like a place where a first-timer can visit without feeling pressured. Please give me recommendations if you have experience with Botox.