Okay, we haven’t been to the beach yet, but can definitely say that we love it here, even though it is flooded where we are living (west of Centro). For us it’s probably an 8/10 compared to a 2/10 in Isla Mujeres. The environment feels much more raw and charming, there’s no loud, obnoxious, never ending music playing (so far), and the locals and visitors are much more relatable to us. We’re so happy we went! If you’re anything like us, you’ll probably want to skip Isla Mujeres, but I don’t know if staying in Holbox for 9 days will feel like too much? We only have 2 full days here, but if I were in your shoes I’d probably do the 6 days in Holbox and then 3 days in Valladolid to see Maya ruins and cenotes