Very convenient, heat up quickly, and last. The only improvement could be for one to charge the second wirelessly, so you don't have to plug in two sockets to charge them separately. They also don't come with a plug, only cables.

bought it a few days ago and i have to say its good to the hand. the feel is fine and it doesnt seem to discolour or lose its texture. pretty good materials as far as i can tell and very very hot! however i believe there is a temp sensor that measures outside temperature so sometimes when im inside it seems more warm than when i use it outside. perhaps its the temp difference but all in all very good . i dont know about the battery life but i dont really care since i will use it max 4-5 hours and only in the winter. seems a little big to the hand ( i have small hands ) but its comfortable enough to hold in your pockets.only thing that is a little irritating is its not charging with every cable. perhaps its my charger or the cable itself but i dont think that would be an issue since im using an ipad cable thats notorious for charging things apart from ipads. so yeah pretty solid and a nice to have.