Gevenalle shifters are very easy to use. The right is indexed and each shift is a distinct click. Simply move the shifter until it clicks and the shift happens. Same as shifting an STI, bar end shifter, or downtube shifter.
The left is friction like a bar end or downtube shifter. It too is extremely easy to shift and also trim. Assuming the min/max of the derailleur is set properly, you can just push it until it stops and the chain will have shifted to the other ring. Easy as anything. And trimming the front derailleur is simple as the lever is easy to make small adjustments with.
Cant imagine using something else on my gravel bike.
