It looks like that kit only releases the latch for the door. You will still need a Popper that pushes the door open. The popper runs about $25. Tone's kit comes with more - a pulley to ease installation and a pin switch that you can hook into a rear light or alarm, as well as the popper. You may want to go with Tone's kit just for ease of acquisition.

I originally bought my actuator on eBay for about $12, so if you look around you can find the basic actuator cheaper than what you found on that site. I've seen several kits and they all appear to use the same actuator.

-- Best, John