I switched over to using Clear 4G mobile hotspot for both home and travel. I would make sure you have a strong 3G/4G signal in your primary location before you cancel your current net connection. In any case, it's worked out fine with me, and I don't notice a difference in speed from my old cable connection.
Though I have more than one smartphone, I much prefer using a hotspot or MiFi device, and not use tethering, wireless or not. I need my phone primarily to function as a phone, and don't want further drain on my battery resources which is bad enough as it is on smartphones.
One advantage of Clear 4G is that it has no set bandwidth limits and doesn't resort to slowing down your connection speed. I've already used 47G so far this month at full speed, but know of others who use far more. It uses WiMax, which does not have the coverage of other 4G networks, nor the speed. But Clear's WiFi hotspot is very powerful, and I can receive a WiFi signal even on other levels in my house, though tends to be only one bar. But not too difficult to setup a separate router in repeater or bridge mode to boost the WiFi signal strength significantly higher.
In fact, I've seen many Linksys 54G series routers for sale at Goodwill for $4-6. These are workhorse routers that can be flashed with several different third party ROMs to turn them into repeaters.
Clear is phasing in their 4G LTE service which will take a couple of years. They've indicated that their LTE will offer the full speed range 60mbps+. But whether they will offer unlimited bandwidth with LTE is unClear? No pun intended.