I am not a fan of the STI shimano shifter.  I think the Campagnolo/LTwoo style looks better and have better ergonomics.  The pivot for the brakes on the Campagnolo and LTwoo is higher than shimano and makes braking on the hood position with index and middle finger easier.  It would be nice if LTwoo doesn't get rid of the current R series.  I do not want sensah, shimano, and ltwoo all braking like mechanical shimano shifters, I prefer having alternative/options.   

Good luck.  Would like to hear your review of them once have one built up.