I used the aquarium incubator when I first started as well, but I quickly moved away from that. The aquarium incubator works fine but the main reason I moved away from it was the mess after the hatch and my clumsy like nature with "Glass"! While I did not break it, I was afraid I would and I still am as I now use it as a temp holder after they hatch (((("but no water in it"))))! The other main reason is the glass is single pane on the aquarium unlike a house window which is usually double or more pane glasses. There is little insulating value (R value) to aquariums thus it uses more electricity to heat over the long haul.
If you keep incubating, your aquarium will work fine for years, but if you expand or after you are addicted (lol) there are plenty of better DYI incubators designs out there.