I just want to say that I just maidened a new plane with Hitec's latest and greatest 7000 series digital servos, and I am completely blown away. I thought my JR DS821 was nice, and now they feel like mush! With the new high performance digital servos, I feel completely locked in to my plane, and that the plane feels incredibly crisp and responsive. Not only does it move immediately as I give it input, the surfaces stop immediately, too. It is an absolutely wonderful experience. I thought I had a good feel of my (Venus) plane before, but it is absolutely nothing compared to the equal sized (Yak) plane that I'm flying with the upgraded digital servos.

I agree that there is no point to put digital servos on a trainer or one of your other first few planes, but as soon as you get something somewhat sporty, I say go for it. The DS821 was a nice improvement over a standard servo in my Venus 40 and I don't regret buying them; they are appropriate for that plane. However I will not be buying any more standard servos or entry-level digitals like the DS821, and will very shortly be replacing all the DS821 servos in my Venus II with something like the Hitec 6000 or 7000 series.

Just my $.02. If you are not totally strapped for cash and are flying a fairly sporty plane, give some nice digitals a shot. You will like them