Context: I stayed in December for three weeks.
Overall: The houseboat is a well-designed, stylish studio with the added bonus of being right on the water. I watched many a gorgeous sunrise on the deck and the Christmas Ships Parade went right by us! I would definitely recommend this to a friend or family member visiting the area. There were a couple of maintenance issues that came up (simple bad luck--could happen to anyone at any place), and the harbor master handled them quickly the same day.
Kitchenette: I cook almost every meal and I did just fine with the plug-in burner, toaster oven, and the microwave. Note: if you are running the heater and two other things in the kitchen (say, coffee maker and burner), the breaker will turn off. You just walk over and turn it back on. I would usually just turn off one of the space heaters and continue cooking. So, it wasn't a problem at all.
Bed area: The bed itself is fine for comfort--there's a mattress pad on it to give some extra plush. There's shelving and space beneath the bed for storage. There's a nightstand with a cute old time-y light bulb for softer lighting. The TV is mounted across from the bed for easy and comfortable entertainment. There are multiple, easily-accessible outlets for your phones or laptops.
Bathroom: There's a toilet and a single shower. The hot water heater does not hold much, so expect a short shower time. However, there is also a marina shower, where the washer and dryer are as well, if you need longer (the host provides a key and it fully locks for privacy; it is also very close to the houseboat).
Security: I felt very safe. The marina requires a code to even enter the parking area.