What is Reddit's opinion of Bench Dog 10-030 Bullnose Trim Gauge?

From 3.5 billion Reddit comments

My corners are rounded, like a bullnose cut on a counter edge. There are no outer corners in my entire house, they are all rounded (there are inner corners but those don't require caps).

Here is an example.

If rounded drywall corners are popular in your area, this can be useful

https://www.amazon.com/dp/B002MMQMGK/ref=cm_sw_r_cp_apa_fabc_OnoZFb55P02QG