Regarding I'm not yet sure that I want it (it was recommended)
I prefer to interpret that as "I don't yet realize that I've always wanted it".

[b]Trust & Betrayal is excellent and was the second title I ever considered a "10" after proving to me that
Cowboy Bebop's awesomeness wasn't just a fluke and, for better or worse, turning me into the raving lunatic I am today. Its only weakness may be that it involves some visual experimentation gone wrong with a few bits of "massaged" live-action footage spliced in that looked a bit garish even then.
The series I consider a rather distant second to the lofty standard set by the OAV but it's still a worthy watch (when you've prepared yourself for a 95 episode series that is). I had seen the bulk of it on TV prior to purchasing it or watching
Trust & Betrayal but I found his pacifist leanings far more poignant having seen the OAV.
The first season is solid shonen entertainment that mixes some episodic content with a fair amount of buildup to the Kyoto arc (the second season IIRC). The Kyoto arc is widely considered the best, which I'd agree with, but each season certainly entertains. The final arc is probably the weakest given the overwrought badguy but I'm not sure if the creators knew how to up the stakes yet again without playing the [nearly] supernatural card. In the end he seems more like a
Ninja Scroll cast-off than most of the baddies in the series.
For the sake of coherence it would be at this point that I'd recommend watching the actual movie. It's like a long and rather bland episode of the series. It seemed like it was pretty chatty and full of posturing and political blustering and rather light on the action but I admit that I may have simply been distracted by the change in [English] voice actors for a large part of it.
Clearly watching
Reflections is the best way to cap it off. I haven't actually watched it for a very long time and only saw it once well *before* watching the series to completion which no doubt robbed it of much of its emotional vigor. At the time I was less than impressed with it but few things could truly hold up to the standard set by
Trust & Betrayal so the cards were already stacked against it.
I'll know that the series was a hit when you post pictures of your Cheness reverse-blade. If it rains blood, then I know the OAV won your heart.