Specifications are as advertised, at least for mine. I did some quick impact testing, and the blade held up fine. The weight is a little different tog et used to if you're coming from a bokken, as the blade is definitely handle heavy (not as much as a European sword, of course) to keep it safer in sparring. But also because of this, it lends itself well to one-handed training exercises as well. The metal tsuba is blackened for aesthetics, and some of that black has scraped off onto my gloves. It's not significant, though. The tsuba is a bit sharp, but mine wasn't nearly as bad as some other Blackfencer products I've gotten that don't have sanded rivets. The construction is completely solid, and has had no issues after testing.
I also initially thought the more rectangular handle would be difficult to keep edges aligned on the down swings, but it wasn't bad at all - another thing to get used to. If you are training with no sparring gloves on, the handle will seem a little long, which is fine for me because I prefer longer handles - but it's made with sparring gloves in mind. The cord wrap wasn't as scratchy as I've had with BF products in the past, so that was also a plus.
The blade itself has been excellent, and doesn't warp after flexing. The katana does in fact flex on thrust, but not very well, so keep that in mind for sparring.
All in all, I think it's a really good katana for it's price point, especially compared to relevant competitors in the synthetic Japanese armaments space. It's well worth the price, and the quality is excellent.