I have a Jackaroo. It's definitely durable to survive me. It's a bit weighty, but comfortable in the hand. I use it at home and at work. It gets tossed around in my purse, I knock it over all the time, but it's doing great. I haven't found it necessary to test how waterproof it is, lol. I found a good deal on them a while back, so I got one for him and for me. He prefers something a bit more pocket-able (more light weight, less rubberized), though it will fit in a pocket. I have an original Zeus on mine, though you could get away with something a smidge bigger.
Elder Dragon! Yes! I have 2 squonks set up with one, then another on a Pico when I want to sample stuff. The drip tip that it comes with is super comfy, just really a perfect drip tip, though most of us do like to customize. Easy to build on, holds a decent amount of juice. It's a great little RDA for not a lot of money. Some aren't crazy about the shape of it, but I quite like it.
Hope this has helped some. I'm sure if you need more technical info, others might weigh in, too.
