If you're choosing a budget friendly option look no further than the Carnival Radiance mexico sailing. We had a good time and enjoyed spending alone time on our honeymoon (all we wanted, really). Unfortunate to go in winter months Nov-Mar because Mexico is still frigid and we barely spent any time outdoors. All hot tubs were always packed and never got to enjoy waterslides, movies... otherwise good sailing. Recommend warmer months especially if you're looking to do an excursion.
By the way, the one thing I would change is a second day at sea. With short sailings like this it's hard to enjoy your ship because the one day off of porting somewhere, EVERYBODY is using pools, hot tubs, chairs. So if that's something you enjoy doing on a cruise; having a relaxing day, do not recommend one day at sea for yourself. Crowds can be insane. Look for longer cruise!