I have had both. I started the build with the build with the DPs GP shift. I did not like the precision of the bearing assembly, excessive use of parts and choice of movable friction surface material (some sort of bronze bearing over teflon). You cannot adjust for wear on the lever or the cam and for me, it became sloppy fairly quickly. Again the Lightech has fewer parts so mathematically all things being equal reliability goes up. The shift rod end bolts directly to the lever so there are no additional cam or linkage assemblies as on the DPs and lastly, the bearing issue. I have over 15K miles on the Lightech's with zero issues and the precision bearings are as smooth as the day they went on. Build quality, both the Lightech and the DP are excellent.