I have been growing tomatoes in Smart Pots for several years. They work great! I have a pretty good sized vegetable garden but can't rotate my crops well enough if I include potatoes in the mix. The bag gives me another spot to grow them and I just put the soil in another part of the ornamental garden after harvest.

Just want to mention the importance of calcium to tomato health. It is very important to help prevent blossom end rot and cracking on the crown. Also helps prevent other diseases by building strong cell walls.

Dolomitic lime can help and there are natural products that deliver calcium to the plant by foliar spraying.