I've used 3 of their barrels, an 18" SPR and two 16" light weights.
The SPR is a 1/2" barrel while the 16's are both closer to 3/4" shooters. They are chambered for MK 262 ammo and can be run hotter than my old Krieger but the Krieger was more accurate. They are all ported about right, leaning towards reliability rather than "smoothness" which is all the rage now.
I think they offer a decent product for the price.
