I have had nothing but luck with them.
C&L 76mm w/ 24's N/A
C&L 76mm w/36's S/C - 8 psi
C&L 80mm w/36's S/C - 8 psi
C&L 80mm w/42's S/C - 11 psi
Each time I simply changed the sample tube and adjusted the MAF curve accordingly. I am now running the 80mm with the "Tuner Tube" and it provides a super clean signal from idle to over 3000 kg/hr if needed. There aren't many meters that can do that.
I would use a C&L w/Tuner Tube over any meter on the market & I love the flexibility it offered me over the years. A new injector or max. flow rate was just a sample tube away. I did a survey on a huge Mustang hop-up site a while back and a huge majority of the complaints were about ProM/PMAS meters. People can believe the bashers if they want, but all meters have issues when people who refuse to get a tuning device think they can just throw on a new meter and larger injectors and go. Then they blame the meter - unbelievable!!