AGD Flatline(very nice, light and well designed), Air America Apocalypse (Works well but heavy), Angel Air (Heavy but very consistent), Centerflag screw in (very good), Crossfire stubby screw in (very good).
Fly Angel LCD, RT Mag, Emag, Frankenmag.
Easily adjustable output, durable, fast recharge rate. Excellent on/off.
The reg is designed to increase output pressure when your tank becomes low on air.
Centerflag makes well engineered products and backs them with great support. The Dynaflow systems are among the best for durability and recharge rate. These are great air systems.
My comment on weaknesses relates to a teammate of mine who runs a Dynaflow on his Angel. His Angel would chrono consistent and below field limits on his way into a game but as he came off with a tank far lower on air he would sometimes get hit with a hot gun penalty and not know what was causing it. Dynaflow's are designed to increase the output pressure as the tank becomes low on air allowing the reg to maintain a fast recharge. This helps keep fps consistant during rapid fire with a low tank but can cause increased fps over a one shot chrono on your way off the field. Better HPR regulation between the Dynaflow and the LPR may be needed for some markers to prevent fps increases on low tanks. This does not appear to effect Mags.
Excellent air systems that are reliable and durable. Nice on/off (but it does sound like a shotgun as you de-gas). Overall system is light and compact. I highly recommend these and the AGD Flatline air systems. For people looking for an air system with adjustable output pressure that they can swap between high or low pressure markers Dynaflow's should be at or near the top of their list. Just be aware that you may need to improve HPR regulation for consistency when the tank gets low on air.