I want to bump this because I went ahead and reserved the studio 1 king/sofabed instead of the 1 bedroom king/sofabed. It's a $150 a night room rate difference and for 3 nights, that will save us about $500.

Just wondering if anyone else has done this and experienced a hassle at the front desk upon check-in? I did PM another FT member who did this as well and confirmed it was fine for 2 adults and 2 little kids, so obviously it can be done. Just not sure if perhaps some hotel staff may be more lenient about this, or is this really just a Marriott website glitch that doesn't allow you to make a reservation in the studio rooms with kids?