Year round vrs 9-month schools!

So I am thinking I found a house, though so much remains in the air. Gorgeous with a great layout for us and the kiddos. Nice location. So I decided to look at the schools whose boundaries we would fall into. One is a dual language program. They teach all grades in Spanish and English. The other is a normal program with values I really like. Both are year round. Where we currently are is a 9-month calendar. On one hand I like the thought of year round especially because my eldest is struggling a little with her reading so it would not give her a chance to forget everything. On the other I am worried she will feel overwhelmed with no major time off. I just don't know. I mean most schools are on this year program so we will have to do it and the schools we are closest too are some of the top rated in the state so that's a great thing. I just hope that it works for us. Any dear readers have experience with year round schools? Let me know what you thought about it.