So I have these to give away. I won them in last years raffle and I've never really got on with them both. They were great at first they really helped me learn to build coils but they've been relegated to the drawer of shame in recent months. The kylin's just far too airy. Great flavour and I've only ever had it leak on me once when I wicked it wrong but it's too much effort for me to get a decent draw as I'm a lazy get. I think the theorem gives decent clouds and reasonable flavour but it's a faffy fucker. I hate the drip tip and I hate the way you have to fill it. Like really fucking hate it. I ended up having to use a syringe in the end. Both in thier boxes with the spares and I even have a pack of 5 notch coils for the theorem as well. Usual names on a list and I'll pick a winner next Wednesday.