My belief is the exit bag method, if the procedure in the "Exit International" videos is followed (see "BedsideViewing.rar" in the Resources tab), except use a 20 cu ft (minimum) cylinder of inert gas for welding rather than the "Balloon Time" disposable tank since those now are mixed with air, has almost no chance of failure. For all except those who aren't able to breathe deeply due to illness, I feel this method is the best in terms of reliability, accessibility, painlessness, peacefulness, etc. I don't understand why anyone would choose to use anything else if they have around $300 and can have a small cylinder of gas delivered to their residence without suspicion. I am in the US and was able to easily purchase helium online and buy a regulator flowmeter at a local tool store as I posted about previously. Maybe in other countries it is more difficult to obtain the gas, but I feel the advantages make it at least worth trying.