I used Skyroam for 6 months but the problem in skyroam it has slow connection and a weak battery which u need to recharge several times a day. I saw the pokefi advertisement at Cathay Pacific and bought the device . I used it for 15 days in China , Hong Kong and Philippines and I think it is the best Mifi ever for the below reasons:

1- I bought 10 GB for 30$ which are valid for 2 years . In 15 days I used only 3GB so you are not obliged to buy daily data for 8$ a day

2- connection is 4G LTE and is very fast
3- the device has a very long lasting battery , I am really impressed
4- It suits me as it covers all Europe and Asia

I stopped using skyroam . Pokefi is the best