I 100%, highly recommend this duplex! The duplex is clean, very spacious, has everything you would need to enjoy your stay, is safe, is quiet and is in a great location.
I stayed here with my 7 year old and we were new to Seville. Javi and Victor always answered my daily questions, promptly, making it so much easier to navigate the city. Additionally, they set up a reservation for us at el museo de flamenco and I greatly appreciated the opportunity to watch such remarkable flamenco dancing in its birthplace.
The duplex is about 1.5-2 miles away from the main attractions in Seville. My son and I often walked there, or took a taxi for about 6 euros (fyi, there are no ubers in this part of the city, but it's very easy to catch a taxi from anywhere). My favorite aspect of this duplex was it's location. It is 2 blocks away from Alameda Hercules, a plaza with a playground and various restaurants. Our favorites were No Piqui, Duo Tapas, the icecream shop and the Cereal Cafe. You will get great food at a much better price at the many restaurants at Alameda Hercules, than near Alcanzar. We met more locals here too, and my son made many friends each night. If you have kids, this is an ideal spot, because you can easily sit and eat, relax, and have a drink, while your kids safely play at the playground. Why we don't have this set-up in the U.S. is beyond me; it's perfect for families.
I have no complaints about this place; it was wonderful.