Perhaps turn-by-turn navigation on pre-programmed routes has been improved over previous models but I wouldn't count on it since previously Garmin had many years to work on that issue & did nothing. Some Explore reviewers complain about kludgy UI & PC software.
Garmin's website doesn't even list the Explore memory capacity but I read it's 15GB which isn't ideal esp when the Explore doesn't accept memory cards & putting in 10X the internal memory would only cost $10 extra. Explore internal battery basically good for one day & then one needs to recharge it with power bank/dyno hub/electrical hookup. AA batteries would be much more convenient.
I don't want to hate on bike GPS's but touring is an after-thought at best for the manufacturers. Garmin's instructions are traditionally terrible, optimizing the devices can require absurd amounts of research & practice.