Ray, Welcome to our circle and to AC.
These really don't have a character or certain attributes that are like other speakers. I would compare them more to the sound of whatever it is that they are reproducing more so than to other speakers.
Think of these speakers as having the dynamics of high sensitivity horns without the drawbacks. There is no hooky, harsh, or ringing that goes along with most horns.
They are transparent sounding like many electrostats but don't have their drawbacks either. They certainly do not have a one person size sweet spot.
They make drums sound like real drums in the room. The same goes for vocals. Everything that they play has a very real sound to it.
back on topic...how much assembly time would the less than average solder hack need to complete a single crossover(in your best estimation)?
Two to three hours maybe....
Here is a pic of the crossover. I have since tweaked it a little and it lost one of those inductors. So it has even less parts than what is pictured.

It is not hard to assemble and if there are any doubts then it can be built for you.