I AM LOOKING TO CHANGE FROM DSL TO HOTSPOT IS IT COMPARABLE TO DSL AND IS IT RELIABLE.
In my opinion, No.
My Cable internet costs the same per month ($20) as the Hotspot service and unlike Hotspot which has a 2GB data cap, my Cable internet is unlimited. There are many days we download more than 2GB in a few hours, much less per month with my laptop and Desktop PC's.
As far as 4G reliablity, I do not have personal experience but if the feedback on this forum is any indicator, I would not want to rely on 4G Hotspot as it is now. I do expect it to improve but it does not appear to be reliable yet.
For me, Hotspot will be a nice travel tool to replace tethering. I look forward to the capability on the new Blackberry 9930.