Store bought or do it yourself either way you have good and bad. My first one was a hovabator which got the job done but liked to give me heart failure do to the constant temp fluctuations. I built my own out of a full size fridge. I use the freezer section to hatch out geckos and the bottom for bp's. This will be the third season and it has worked flawlessly. I got it up and running well in advance so I could have time to work out any bugs. Plenty of DIY on YouTube also.