I really only like it for difficult to cut blocks like curved pieces, and for raggy blocks.
Otherwise, I believe I'm just as fast (if not faster) and nearly as accurate cutting blocks and strips with my rotary cutter and my various rulers, and I cut with a lot less waste than the dies do. And I enjoy the rotary cutting process, I don't enjoy the die-cutting process.
But I'm still young-ish and don't yet have any issues with arthritis or bad elbows or shoulders, and that's a big consideration. I can totally see myself getting the electronic cutter someday, once my joints start to go bad.