Obfuscation – Obfuscation is a key feature if you are using a VPN in China, schools, work networks, or anywhere that VPNs may be blocked. However, if you are not in a restricted network situation, obfuscation is generally not necessary and may impact performance. (See the best VPN for China guide for a great selection of VPNs with built-in obfuscation features.)
The more locations a VPN provider houses servers, the more flexible it is when you want to choose a server in a less-congested part of the world or geoshift your location. And the more servers it has at each location, the less likely they are to be slow when lots of people are using the service at the same time. Of course, limited bandwidth in and out of an area may still cause connections to lag at peak times even on the most robust networks.
In the past, some VPN services would offer different pricing tiers, each of which offered a different set of features. One way to separate these pricing tiers was to limit the bandwidth (how much data you can transfer). With premium services, this practice is now almost unheard of, and all of the services we have listed do not limit their users' bandwidth. Bandwidth limits live on, however, in free VPN services.
HotSpot Shield is a product that has had some ups and downs in terms of our editorial coverage. Back in 2016, they picked up some very positive coverage based on founder David Gorodyansky comments about protecting user privacy. Then, in 2017, a privacy group accused the company of spying on user traffic, an accusation the company flatly denies. Finally, just this year, ZDNet uncovered a flaw in the company's software that exposed users. Fortunately, that was fixed immediately.