Hi.
Wondering about what?
Don't own one, never will, no use for me, but:
Those are extremely lightly constructed racks for light equipment. Pres', mixing desks, controllers and such. And/or for stationary use.
The lack of proper rack-rails is the first -, as the equipment is naturally only attached to the rails. 60 lbs won't give You thick enough sides to withstand any deforming forces or impacts.
The wording about the shipping and shipping prices makes me wonder...
The price is VERY tempting, that I can agree wholeheartedly. Just bought some rack suff to again make my own and it is expensive.
As with some other somewhat controversial gear

, these have their place and users. Just don't expect much if You take 'em on the road a lot.
Regards
Sam