Techcrunch today went with a post "Skydeck Mashed Up With Google Voice Could Be The Perfect Combination".
I'd not heard of Skydeck, so I checked this out with interest tonight.
They are similar to GV but instead of managing all your phones, they manage only your cell phone. They do transcribed voice mails like GV, you can send SMS text from your PC that looks like it came from your cell, you can backup your addresses etc. all like GV.
Their main talking point is that you don't have to hand out a new phone number, but that it works with your existing cell phone number.
As I mentioned in a post in April, how you implement GV can take some thought. I finally decided to use it as a manager for my cell phone calls, not unlike Skydeck.
With GV, I have to hand out a new phone number, but that is advantageous. The phone number I give to customers is independent of my the phone. If my cell phone is lost or stolen or breaks, incoming calls can be routed to another phone easily.
If I ever regret giving anyone my cell phone number, I can easily screen them with GV. Not sure I can do that based on what I read about Skydeck.
Skydeck does make the point that with them, you'll still get calls to your cell if the internet is down. With GV, if Google is down, you won't get your calls. Google does have outages.
There are some people who may want Skydeck's functionality. Personally, it does not fit into my process. Apparently it relies on having access to your cell phone providers online account information for your phone. With Verizon, I would have had to buy that for $3 a month on top of Skydeck's cost. Seems sort of kludgey to me.
Best of luck to them. For a startup to be going up against Google who is offering their product for virtually free, is daunting.