I've been using the Interfit studio lights for about two years now, and they're a really good entry-level kit. Slightly different from the one you've picked though. I used this one http://www.jessops.com/online.store/products/74367/show.html
It's reliable, flexible and will give you a good basic studio setup.
You have three options for commanding the lights.
1) You get a wireless radio-trigger that mounts on your hotshoe. The Interfit ones are about £40 I think.
2) You get a hotshoe adaptor and run the cable from that to your nearest light and use that as a trigger.
3) You use a flashgun to trigger the studio flashheads. (You can set them so that if a flash is fired, they recognise it and fire. Synch speed is up to 1/200th of a second I think)
Best option is the wireless radio-trigger as it doesn't restrict your movement, and as long as one of the lights fires, the other will too. I've used all three methods an in order of preference, it's 1, 2 then 3.
Since I bought the Interfit kit I have expanded it by purchasing a beauty dish, barndoors, snoot, larger softbox, stuff like that. There's a page on my website with 12 images on it. Numbers 1, 2, 6, 7, 8, 10 & 11 were shot using the Interfit lights.http://www.craigmcguire.co.uk/portfolios.php
On to speedlights - as far as I'm concerned, using speedlights on tripods with portable lighting modifiers and a radio trigger is much more flexible and just as functional as using studio kit, but without the drawback of having to have a mains power supply. The flip side is that it's a bit more expensive, because you get what you pay for.
I've used cheap radio triggers that were £25 and they don't last. I've used expensive triggers and they're a lot better, but LOTS more money. Throw in the cost of flashguns, tripods, softboxes, etc, and it starts to become a pretty big number.
I can't offer any advice on Canon lighting controls because I used a Nikon, but there's a ton of information out there if you search under 'Strobist'. That'll get you a load of off-camera flash techniques, tools and recommendations.
Hope that's of help.