He's given me 2 x Jack 110s (1x 10" + loads of horns) and 2 x Jack 112s (1x 12" + loads of horns).
So far I'm pretty impressed with their light weight and high output.
They handle the range of my 6 string very well. Good bottom end but not muddy. Excellent clarity right the way through the range. The tone / colour of the middle / upper registers is quite different to what I'm used to. Possibly because of the use of horns?
The horns have an on / off switch which I would prefer to be controlled with an attenuator.
The jack10s are sound quite different to the jack12s. For some reason the 12s are surprisingly brighter in the top end and Harley did say that might be the case. Probibly too much so for some players but that's why there's a switch for the horns. The 12's have more output and bottom end range but are physically larger as well. Weighing in at 19kgs still makes it a very easy cab to carry.
For me so far the Jack 10 is a standout for small gigs or as an on stage monitor. It's small and weights only 12kgs (my 6 yr old can lift it!) . I think Harley said it's rated for 250watts? Has a little leg that kicks out to angle it up for monitor use which I love. A 4ohm version would be an excellent match for my little GK 400RB head (or one of those other little markbass, Genz benz or ashdown tiny digital amps). Bag with leads and amp on one shoulder bass in one hand and cab in the other. nice.

Oh and Harleys workmanship looks great. Nice finishing and attention to detail. If you're not the type of person to try and build these cabinets off the plans yourself then he is the guy to talk to.
Some pics to follow.