Stern is inconsistently good. Some of their games are great, others are not, some have excellent code support, others do not, there could be no quality issues one month, and the next cabinets are splitting, one game may be loaded up with featues, the next bare with two plastic ramps and little else.
Have things improved at Stern? For sure. Are they consistent in terms of quality, offering value for the price they are charging, and completing deep and unique code in a reasonable amount of time? No.
Still waiting on Ghostbusters code to be completed 26 + months later.