I've been using my Tenkara for a few months now. So far it's been great. There are some new videos on the Tenkara USA site that will help with casting technique, but even without them you'll quickly learn what works and what doesn't.
I've taken it out on the Manatawny this fall and had a blast. Caught a 1/2 dozen trout and one smally the first day. The Manny may be a little big for this rod. I had to stealthfully wade into position for each fish. The line lands almost imperceptibly, but it still scares fish in the low water if you line them. I did it a couple of times just to see what I could get away with. So, don't think you can be sloppy.
Bow/sling casting is awesome with this rod. It puts it just where you want it. Overhead, sidearm, underhand, all work well. Pushing the rod forward after the power stroke really softens the landing and extends the distance. No problem with heavily weigthed bugger and such.
The fish I've landed so far all range from 11 to 14 inches on 6 and 7x tippet. I thought the 14" would break the 7x but he didn't. I just swung him in letting the rod absorb the jumps and surges. There's no line out so landing the fish is very fast. I don't normally use a net, but with Tenkara I bring out my rubber net. It's just faster when you're using a long rod. Otherwise, I'd have to grab the leader and just one last minute jump and I'm sure the tippet would snap. So, far I've landed about 15 trout with no breakoffs. I really want to try in on smaller streams like the middle/upper section of Hay and some smaller area tribs.
You can choke up on the rod or collapse a section when you need something shorter to work with. You'll also like collapsing it when you need to climb up a bank or go through thick brush or just tucking it in your waders for the walk back to your car.
Ah, yet another way to enjoy fly fishing