Question about Elgato Green Screen

One thing in advance: In principle, MS Teams is very good at hiding the background.
However, it requires the same as a green screen: Appropriate lighting.

The screen should be evenly lit, otherwise there will be too many green tones and you will have to set the filter in the software with more tolerance (which is then also not ideal, as noise usually results).
There are different approaches to lighting. I myself have simple spot lamps that are aligned accordingly, others use front lights or more complicated solutions.

Besides the illumination, a wrinkle-free colour surface is important. Thanks to the construction of the Elgato, the screen is well supported and taut when it is pulled up. That's why I no longer use my simple fabric screen and have treated myself to the Elgato.

In your case, I would check whether you can do something with the light before you treat yourself to a green screen and then be disappointed.

If you're planning to get a green screen "one way or the other", then you can't go far wrong with the Elgato. It's easy to store, it's quick to set up and the workmanship is top-notch in my opinion.