I have 2 velvet marbles, and I love them. I don't see them at all during the day, but with the lights out I can sit and wait and they come out to hunt. They are finally used to me being there and don't run away straight away. They make funny noises and climb up walls and hang upside down watching crickets run on the ground below them. They aren't too happy when it comes to cleaning, so I find a bigger enclosure doesn't get as dirty so quickly. The less time I spend with my hand in their home the better.
I have a gecko cave, so makes viewing a lot less stressful for them. I'd highly recommend one of those. The only bad thing is they like pooping on the outside of it, so I have to remove it for cleaning and they don't like it.
I was thinking I had 2 girls for a while, but the boy has finally grown some balls! hehehe So maybe looking forward to breeding next season! Otherwise I find them very easy to look after!