I have used it myself ever since I bought my quartet for $120 back in 1999 when that seemed like an expensive deal
But its a small price to pay for a tool that comes with such a great deck builder
All in all, if you are trying to figure out which KMC sleeve to buy, the decision comes down to whether you like glossy, slightly textured, or heavily textured backs
If you want to dumb down the list a bit while maintaining the combo potential, these need to go
Then if cast from exile you'll also gain twice that power's life - great for saving yourself and then free in Type Four where you have infinite mana but just one spell per turn barring alternate costs like Force of Will or this
The archetype is a nice interesting one, much like the one it replaced in my cube (Reanimate), in that it is able to be done across so many colours