Hi
Lacsa are OK. You will probably be on an A320, which is a decent plane to fly in, unless you're flying more than 3 hours non-stop. Their on-time performance has improved. However, luggage problems are common. Also make sure to lock ur personal check-in luggage. As for the surfboards... I have no idea. Look up the Office phone numbers for the city you live or the closest major city...they should offer some assistance
Enjoy Costa Rica