After 15 minutes I was sold. The script does what it says on the tin, and it does an extremely good job of replicating Forge's abilities whenever possible, and exceeding them whenever capable.

There are a few obvious problems, but it's less a fault of the script and more just an engine limitation. The controls are sub-par, but the HUD does a good job of clarifying what does what. There are a few minor differences in functionality between this and Forge's visual mode, but nothing that breaks the bank. The only key problem I have is that, currently, yaw and pitch aren't locked when aligning textures, meaning that if you want to align a texture on a wall you can't do so without simultaneously looking around. Adding control panels is a little bit sticky, but workable. There are a couple other personal preferences but they don't really detract from the script.

Overall, this is an outstanding utility that very nearly renders Forge's visual mode obsolete, and I heartily recommend it for anyone -- especially for mappers who tend to have visually complex maps that crash Forge.