I used to cast a lot of bullets, enough to compete in PPC and practice daily. I ran the Lee 10 pound pot, two of them. One was heating up while I was casting with the other one. I wish I had gone to the 20 pound, but it was either not available or more $$ than I wanted to spend. Probably, not available. Yes, they will leak, but that is an easily remedied problem. In the meantime, keep an aluminum pie plate handi to catch the drip. Sometimes, the "drip" can empty the pot pretty quick! They do produce a good pour but they are not perfect. I still have them and use them.
For the money, the are good melters. Remember, use this pot only for casting. If you need to smelt lead and remove impurities, get a separate pot, like a dutch oven, so that all the crap left behind from smelting does not mess up the pour spout.
Enjoy it, you have started on a new hobby, one I find every bit as much enjoyable as shooting.
Kevin