Pros: Traveling with your man (or woman) gives you the chance to relax and enjoy your relationship outside the stress and complications of everyday life. Going to Europe with my boyfriend took our relationship out of our comfort zone and made it so much stronger. Traveling as a couple allows you to focus on each other and make memories that will last a lifetime. Also, two words: Hotel. Sex.
Cons: There's nothing worse than taking a trip to escape your troubles, and then bickering the whole time. Also, if you're not totally comfortable with each other, tiny hotel bathrooms plus questionable tap water is not the best combo.
Take the trip if... you're secure in your relationship and not using a vacation as a band-aid for your problems.