Crusher,
it's really really easy to remove the rubber blades. I just did mine last week and was amazed at how easy it was. Just make sure you set aside about 30mins to 1 hour to do both blades.
You just have to get over the initial fear and then once that is out of the way, it's smooth sailing right through. Also, the wiper brackets that hold the rubber strip will seem fragile, but I was mucking around with it quite roughly and it was tough as nails. I think you need a bulldozer to run over it a few times before it eventually cracks up.
Anyways, I bought the Dura Edge (refill only) from "Brother Peter" in Damansara Uptown for RM55/-. which is the cheapest price quoted yet on this forum. In fact, I am sure some weeks back the lady actually was willing to give to me for RM50/-. She claims price has gone up since. Have installed it and used it for the first time last night and it was perfect. The Dura Edge brand comes in charcoal black and color wise is much much better than the horrible "light grey" color silicone refills from Carrefoure.
One more thing, it's very very easy to remove the existing rubber blades from the bracket, but to install the Dura Edge refills require a little more effort. The original bracket have several "little hooks" to hold down the original blades. Dura Edge comes with it's own "sub-bracket" which is a little wider. So you will need to widened the clips on the original bracket using a plier.
PM me if you need further help, we can meet up and help u on your way.