It really depends on where your at on Youtube, if you are a large channel it may benefit you as networks seem to cater to their larger members much more then their smaller counterparts. If not then there really is no need to do so, being part of a network and small channel the only positive I've seen to being in a network is use of better music then what most sites offer non partnered channels. So I would say no not really worth it but in the end its your decision.
I'm partnered with FunctionalENT a sub-network of Freedom