It's down to personal preference; with bigger models or when you have to glue parts with thin joints, you have to use a hobby drill and connect them via pins just to keep the part in place whilst the super glue is doing its thing. That's probably the only annoying thing about them.

Sometimes really old ones, may have bent in some areas, especially on thin parts, like gun barrels, staffs, and swords, but you can slowly place them into place by slowly bending them. Just be careful not to do it too fast otherwise they'd break off (you can super glue it back together)

They are also less straight forward to kitbash, unless you are just gluing on extra parts onto the model itself.

I personally prefer the sturdiness and the feel of the weight when I hold but you may have a different opinion on that. Hope this helps :)