This is a fantastic house for a large group of people. We were a family of 8, including two young boys and two elderly parents, and the design of the house meant that we were able enjoy our stay without getting in each other's way. The house was clean and modern and every room has an en-suite bathroom. The pool on the roof was a nice added bonus!
The location of the house is ideal, being around 20 minutes' walk from the Cathedral area (via the famous Setas de Sevilla). We made this walk numerous times during the trip and never got bored with it. There are several bars and small restaurants within two minutes' walk of the house, and the Alameda de Hercules, which has 20+ bars and restaurants is about 7 minutes' walk. Also really important is that there is a "Dia" supermarket only 2 minutes' walk from the house.
Finally I must mention the extremely good service we received from Damian and the team at Veoapartment. All communication before the trip was excellent, check-in went like clockwork, and any concerns we had during our stay were dealt with promptly.
In summary, I would highly recommend that house to large groups who wish to visit Seville.