Pros:

+ Walkie talkies ar cheap
+ Walkie talkies are a one-time cost
+ Walkie talkies are simple to operate
+ Walkie talkies are small & light devices
+ Walkie talkies operate on small batteries
+ Walkie talkies do not require a license to operate
+ A climbing party members can stay in touch with each others at all time
+ Alert to support and rescue facilities can be sent immediately after an accident
+ Walkie talkies are often an International Mountaineering and Climbing Federation requirement
+ Some of the latest version include built-in AM/FM radios, barometers, altimeters and digital compasses.
+ One version even includes a weather broadcast that would warn people of possible storms or bad weather.

Cons:

- Help is always hours away at a minimum
- Often help cannot reach the scene of an incident
- They do not by themselves provide medical assistance
- Walkie-Talkie have a limited range (3 Km / 2 miles)
- You need to change channel if someone else is using the same one
- Terrain like deep gullies and cliffs can affect the clarity of the frequency

Pros:

+ Quick improvement in the physiology of individuals affected with Acute Mountain Sickness.
+ Statistically, research shows that extreme climbers using O2 to descend are about one-third as likely to die as those who do not.
+ The use os oxygen makes extreme climbing irrelevant as it effectively brings a 29,000 ft mountain down to the level of a 19,000 ft peak. It is also unsporting because, in effect, it lowers the physiological height of a peak.

Cons:

- Not always available
- Flow needs to be carefully monitored
- Flow needs to be precisely adjusted to specific situations and individuals
- Needs to be administered before HAPE or HACE symptoms appear to be really effective.
- Tanks and regulators are cumbersome and heavy to carry up; often they must be left behind in emergencies.
- Oxygen delivery works best as a preventive preventive measure; yet, its preventive use raise more issues than it solves: it creates an irreversible dependence that could be fatal if supplies run out at high elevation.