I'm not exactly an unbiased observer, but the location was perfect for my needs. I came up to Portland for a wedding and Tiffany's garden studio was perfectly placed midway between the venue and my friend's apartment. That being said it's also just up the street from several small, cute, restaurant and bars.
There are three separate sleeping areas: I slept in the queen bed, my friend on the trundle, and someone could have easily slept on the fold out couch with the addition of the foam sleeping pad that's provided in the space.
The unit is modern yet cozy thanks to the expert furniture placement, plethora of throw pillows, and polished concrete flooring covered by several plush rugs in the sleeping and sitting areas.
The only word of warning I could give is that if you're taller than 6' (I'm just over 6'2) then you'll have to duck when entering the bathroom and be mindful of the beam that runs along the separation between the living room and sleeping area.
All in all I immensely enjoyed my stay and will likely be booking this studio again the next time I'm in town.