They're extremely sharp
Individual bots are all solid and hold up, but their articulation is a little out of date
Combined mode is pretty hefty but not incredibly posable
Biggest issue is the strength of the arm joints isn't strong enough to hold a gun form member, or the full sized combined sword (I like using the weapons to make two twin daggers instead)
In general most people regard it as one of the most solid 3P combiners. The asking price is pretty tall if you get it as a set but if you can find a price you're happy with it's pretty worth it.
The only flaw with the set is that the combiner head is on a pretty shitty joint, which they offer a replacement part for that usually gets packed in with the torso bot, but actually replacing it is really hard. You either need to drive out a 2 inch long pin and drive it back in, or just cut the old part out of the pin channel is stick the new one in via friction.