We have "reserved" the church for our wedding next Feb, but still have a few concerns given all the conflicting information we have gotten from different WCs.
Originally we were told by a WC that we had to book in person, and not more than 6 months in advance. Then we went to mass last November when we were in Vallarta, and we were told to come back 6 months before the wedding, like March or April (not exactly 6 months in advance). Then we finally decided on a planner who said we didnt have to book in person, and they were able to reserve the date for us. I did talk to 2 references who had also booked the church through this planner and not in person, which is part of the reason we decided on our WC.
We were also told different stories about rehearsals and decor. The planner we decided to use says that we will be able to go in the day before for a rehearsal, and we will have access to the church before the ceremony in order to decorate. Other planners said that rehearsals and decorations were not possible.
My only other concern with the church is the "English factor." We went to English mass and didn't understand a single word. The combination of not-so-great English skills, a bad PA system, and all of the fans mae the priest completely unintelligable. Some of the references I talked to said that they had the same experience during their weddings. At Our Lady of Guadalupe, you cannot request which priest will perform the ceremony. We may turn off the fans and hope for the best, or just opt for the ceremony to be performed in Spanish and I will have to learn my part.
One of the WCs we met with recommended Our Lady of Refuge as an alternate church. She said they are easier to work with and you can choose which priest you prefer to perform the ceremony. I saw some pics online - it looks very pretty, but not as beautiful as Our Lady of Guadalupe.
The most important first step is to get all of the paperwork together with your church at home. We had to fill our 2 forms ourselves, have 2 witnesses fill out forms, take a 200 question "test", provide recent copies of our baptismal certificates, and take pre-cana classes before our church could send everything to the archdiocese here in SF. From there, the archdiocese will send to the archdiocese in Tepic (NOT Guadalajara) and the archdiocese will send everything to the church in Vallarta.
Hope this helps!