I have owned the original Terrapin, Gunwerks G7(1st and 2nd Gen), and Sig2400. For ELR beyond 1200 yards, my Terrapin, owned for 6 years has performed flawlessly and capable of ranging well past 2000 yards. For hunting to 1200 yards, both the G7 and Sig2400 ballistic RF's produce identical ranges and ballistic outputs I've tested to 1340 yards, verified with actual POI, and using identicle inputs. Each model has its own features/differences, and I think the choice will come down to personal preference. I've owned the G7's since introduction(about 7 years), and they have performed flawlessly. I have owned the Sig since intro(about 2 years). I had issues with the Sig initially, but once I had this early version re-flashed by the factory, it has performed quite well. IMO, both are very solid ballistic RF's!