My Highway One Jazz is a great bass. It plays well, and looks the part, I like the finish, although many don't.
The build quality is good, and the fretboard is nice and smooth.
Soundwise, I found mine to be very dark sounding, lots of bottom end, and a nice top end click (Steve Harris style), but it lacked a little top end sparkle, and I found it hard to find a traditional jazz style mid bark.
I've upgraded mine with Villex pickups, which have transformed the sound from "nice" to "amazing" at a cost of about £120. With the upgrades, the bass is now a fantastic bass, extremely powerful and versatile, whereas off the wall it was less so, although still very playable. It was bought as a backup to my Stingray, but live, I've found myself prefering the jazz to be honest.
I believe the hardware could be Mexican, with the timber and assembly of the bass originating in the US, although I can't be 100% possitive about that.
It's a great bass, very playable, and with a great tone out of the box, but you won't get a Marcus Miller type honk with it if that's what you like. For rock, pop or even reggae with a deeper tone it'd be great, but for slap, I found it a bit too dark sounding.
I guess if you were asking me which bass I'd buy today, a Geddy or a Highway 1, if I had the choice, I'd buy a Geddy. I reckon it'd be more versatile as a standard bass straight from the box, and being made in Japan, I reckon the build quality would maybe be superior too.
I love my H1 and won't part with it, but only really thanks to William Villex and his pickups, it really has transformed my bass, but at a price.
Hope some of that helps.