Nach - It's not that bad. It's not a 30 second mad dash to the checkout. In fact, it's been my experience that once an item is in your cart, it's safe. I've placed 3 orders and I've never lost an item that made it to my cart.
It took close to 45 mins to fill my cart on my last order and then went outside for a 5 min vape before checking out and didn't loose anything.
My last order...
Note: others have claimed that items were removed from their carts when an item sold out, so take the above with a grain of salt. I have no idea if I got lucky or if the "others" did something to jack up their carts.
Edit... Nach - Seeing you in this thread just gave me a vision of LUX tubes with blued top cap and switch...