I only recently have any experience with Shimano Tourney level components, and as expected, I had very little to complain about. The quality that Shimano has started to provide on more entry level components has really given a whole new group of consumers an entry point into the road bicycle market.
2017-2018Tourney Road components are much like Sora 2300 with few exceptions. Like 2300 Sora, Tourney had thumb indexed down shifting.
Read about R2000 Claris here.