I stayed in one of their studio suites last month and I think that while their services are top-notch, it's not worth quite as much as the hefty price tag it costs to stay there.
In comparison I am at a studio suite at another serviced apartment right now where I'm paying half of what I paid at the V. While the maids aren't as determined to break down your door at all hours of the day to clean every spot in the room (not sure if that is a good or bad thing), and there is no reception floor here to cater to my needs, it serves me well as someone who is not expecting an over the top service experience.
I can also attest to the noise level at the CWB location as I stayed on the 4th floor which is pretty close to street level. Besides the trams and buses going, I remember one night they were digging a giant hole on the street right in front of the McDonalds and there was no way anyone could sleep through the noise and bright spotlights they had going. I would recommend trying to get as high up a floor as you can if you plan on staying there.