I have prayed with many different Siddurim and the Spanish one is the best one I have ever had. The transliteration is of very high quality (very close to real Hebrew!) and the easy structure of the Siddur helped me in the beginning of my conversion process to follow along in the synagogue service. I can highly recommend the Siddur!
I love the Spanish siddur! I purchased it in 2019 when I first started my conversion and has been by my side ever since. It is beautiful on the outside and it includes the best transliteration I have ever found. The Spanish translation is also very good. This siddur will always be my favorite