Marek,
I really like the Eduard sheets. Just take good care of them and they will last a very long time. Put them back on their carrier sheets when done.
I really regret not using them on the last model I did. I guess I forgot how terribly thick Tamiya's decals are, and a case of laziness on my part to take the time to use em. Oh well.
I think you will like em alot more than regular wet-n-stick decals. Just take your time when placing them to the model in regards to position. Spray lightly from a 90 degree angle to the mask. You don't have to fill the area in one spay. At least that's my experience.