grim -
These days really not too much of a difference, TD technology is pretty much a science nowadays,
.
Basic caveats:
More potential moving parts, more potential things to go wrong.
Slight increase in weight over a similar one-piece, due to the coupling mechanism, note the word "slight".
Bebnfits -
Quick weight change, by changing limbs
Easy to transport.
The rest is personal preference, I have several TDs, and they're fine (even the two Bear Mags, that blew up on me), personally I prefer a one piece bow, more astheticly pleaseing.
Viper out.