You stated in the review that the battery is sealed and there is no access to sd card or SIM. It's true the battery is sealed, but if you slide the back cover up, you can access the sd card slot for up to 64 gigs additional storage. The SIM card is there also.
I almost ripped you a new one because your performance section made no mention of the single greatest measure of performance known to any computing device - the processor. But then I found that part of the review nested under basics, which I usually gloss over or skip entirely. Seems a little misplaced doesn't it?