Overall- a great experience and I am glad we had to do it!
Pros- it was fairly short 5:30-9:30pm Sat night and 9-5 on Sunday. Good worksheets for self reflection and couples sharing. Beautiful setting- we were able to go outside when meeting privately with FI. The priest was funny and had a lot of experience/stories to share. The food (lunch on Sunday and snacks the whole time) was good.
Cons- It was way too many couples- 65! We spent the majority of the time listening to lectures by married couples and the priest. The main set up was listen to a presentation for 30 min, then 10 min for personal reflection (on the worksheets) and then 15 min to meet with your FI and discuss the topic. Really, the focus should have been much more on the couples personal reflection and sharing. There were also a some group discussions with other couples, but these were short and not very productive- more joking/not serious.
Other con- the short speech railing against birth control and prenatal genetic testing- and supporting only Natural Family Planning. I actually want to look more into NFP, but didn't appreciate the scare tactics about birth control. But I was not surprised about this part either.
I think we had an opportunity to really focus on our relationship and talk about the 'tough' things. Nothing came up that we had not discussed, but it was nice to really think and devote time to each other, I really feel that it strengthened our relationship.
I would strongly recommend pre-martial prep for anyone, it really was a helpful experience. For pre-cana, I might suggest trying someplace with smaller groups than Espousal, but it was still a positive overall (not bad by any means).