It was well worth it for me, but then again its a case by case thing - I have purchased atleast 1 of each set of pokemon and then the 3rd out of every pokemon gen so it was a no brainer for me.
Currently dreaming of: DKC4 or Sonic the Hedgehog 4 (classic 2D platformers) for WiiWare, Smash Bros. for DSi, New Super Mario World for DSi, a Wii remake or true sequel of Final Fantasy Tactics.
One down, hopefully more awesomeness to come.