I picked up a set today and used them, seem to be decent. The complete manifold with gauges was about 240 but it didnt have hoses. The individual gauges were like 99 a piece. I'm starting to wonder why I paid 50 bucks for a robinair manifold when I like the manifold I had. Anyway, they seem to be decent gauges. They shut off after about 5 minutes by themselves which will save the 3 AAA batteries in each gauge. They have a backlight but unless you are working in dark conditions, it just seems like something to eat the batteries.
The nice thing is there is an R button where you select the refrigerant and the saturation temp is also displayed. I'll know more about calibration in the future.