in the portrait orientation, with my 70-200 mounted, it sagged.
however, with my 24-70, it held on perfectly. in fact it's still holding there and the standard level still shows leveled.
so, all in all, for $99 on my setup which i used the 24-70 the most, will be good.
I kind of figured it would be too much to ask for it to hold the 70-200 level in portrait but the fact that it holds the 24-70 is good news! I think I'm going to be quite pleased with the value of this tripod. Thanks for cleaning up for us!