Is iVideo pocket wifi famous?

I am lookng for pocket wifi or hotspot for my Japan tour. I have found a website about it. Has anyone ever heard about it? It is very cheap , but how about the signal? I would not want to fet on the internet during my trip. Hope anyone gives some suggestion. Thanks! http://goo.gl/jOJjha

No.

But SoftBank is one of major career(big cellphone service company) of Top 3(docomo/NTT,au/KDDI,Softbank).
http://o.aolcdn.com/hss/storage/midas/515a860dcbedcf863cade9db4c4327d0...
"4G LTE" Signals are no problem.
http://www.softbank.jp/mobile/network/area/map/
(colored in Red all areas are so)

304ZT specs:
http://tm.softbank.jp/mobile/sbm/lineup/data/304zt/
http://tm.softbank.jp/mobile/sbm/lineup/data/304zt/specs/#tag
But this model a bit old 2014's but no problem.

of the top 3, softbank have the least best coverage.
comparably good in cities but once you outside ...