This putty isn't better than the Tamiya putty (although this one doesn't seem to shrink as much), but it is much more economical for larger seems. If I'm building something like a ship and there's a big seam to fill, then this is my go to putty. The more expensive Tamiya is saved for smaller seams on finer-detailed parts.

This putty can be sanded, but the experience is strange. Having too much putty sticking out can result in you accidentally breaking small chunks of putty off.