I did! I decided to build a bike from frame (meaning I hired a shop). Didn't ride it. Didn't see the frame in real life. I read a few online reviews. And I guessed at sizing based on those reviews and the fit of my current bike. After the frame was ordered I did lots of test rides on similar frames and sizes around the size I got. I did make a last tire size change from 700c to 650b to reduce tire overlap.

I asked the shop of my hunch on the bigger size was right. And sure enough it was fine. I was right at the very edge. A smaller size would have led to a small cockpit and perhaps toe overlap. The bigger size only has a little bit more downward adjustment of the seat, but handlebar reach is perfect.

I am about 3 weeks in and happy with the sizing. The smaller size wouldn't have been awful. But the current bike is very comfy, handles well and feels great. It works for the intended riding style.

It took a few adjustments on handlebar and seat positioning and setback, but I have done more miles and traveled further with ease on the new bike.

I have zero experience with building bikes and and new to riding as an adult. As a teen I read a lot and read a bit about bikes but am no expert. This process made me learn a ton about fitting and geometry.

If say this works fine if you have an ok understanding of geometry (or an expert to lead you) and you know what a good fit is and what can be changed easily.