Amed Town at slightly higher cost, and with far greater comfort and safety, but if you can't get one of those make sure to do your research. Most of the speedboats are dangerously overloaded, with improperly sealed petrol tanks and smoking on the rear deck allowed. Buy direct, as touts and agents in Indonesia will often show you a different leaflet or picture than the boat you end up on.
If you have a lot more time than money, it is possible to get the 'slow boat', a large and solid vehicle ferry that makes the crossing to the port of Lembar in around 5 hours. This is incredibly local, but surprisingly comfortable, with air-conditioning and power outlets on the inside decks and a tuck-shop cafe on board serving always dependable Indonesian Coffee. Adding in transfer time to Bangsal and across to Meno, along with what I would call 'fluid' scheduling means you can expect to spend 2 days to get from Bali all the way to Gili Meno though.
None of this should stop you from going, quite the opposite in fact. Plan your trip, and spend a few days on Gili Meno. Find yourself a patch of heavenly beach all to yourself, rent some snorkel gear and get into the beautiful shimmering sapphire water. Pack plenty of sunscreen, and always remember to take precautions and let someone know where you are going and when you will be back if you head out alone. The Gili's are small, and close to each other but are also home to strong currents and deep water. In case you don't like the suggested ways of getting here - do not try to swim between the islands!
March 2017 - Sustainable Travel
96 - SEVENSEAS