The concern I have with the one you posted is a) solar charge at that scale isn't any good IMO b) the battery weight is 35% lighter than anything else with 20000 mah ratings, that worries me.
Personally, if you are going to take power in , a power bank is the way to go ... the solar aspect is just a gimmick IMO, leave it out of the selection criteria and get something from a larger name.