There is nothing in there about the 275 yet (there is an update in review with techpubs). However, you are good with mesh between AP-275s out to about 400-500m, but you first really need to know what your throughput requirement is, what the interference looks like, etc to get a good idea on what you can expect. If you need to go farther in the mesh link, you need to look at the 277 or the 274 with some antenna (depending on what you need)