We won't lie, the act of charging is a pain. For one thing, you have to take the waterproof cover out each time (this is the downside of having a waterproof tablet) - unless you're using the pricey official dock with charging contacts - and although high quality and secure, we can't help but wonder how long they will last.
Add to that, this is not a quick charging device. Where you can plug an iPad in for a 10 minute power blast and be confident you'll gain a bit of juice for a quick jaunt, the Sony Xperia Tablet Z takes forever to charge up. We found it's definitely an all-night job. Slow doesn't come close to describing it.