I have done some research as I bought one a couple of weeks ago and agree with the previous responses.

I've heard that they're difficult to kill. I read somewhere that someone left theirs for a month and it was healthy again when they started looking after it. If they're not getting enough water, they will begin to shrivel. Let the soil dry out, then wait a couple of days before watering. Water a little once a week in spring-summer. Water once a fortnight in winter.

Don't keep them in strong sunlight. If you want to repot, use a sandy soil or cactus soil. I think you only need to repot when it becomes top-heavy, or move it up a size once a year.

Mine is growing a new leaf, and it seems to be growing just over an inch a week. I notice it getting longer slightly every day.