Prepare to be disappointed. Sprint is advertising its LTE at 6-8Mbps, with peaks up to 25Mbps. We have seen speeds into the 30's, in ideal circumstances. However, 98% of us will be satisfied with speeds like what Sprint is advertising.
Also, I have a Verizon LTE hotspot. I most often get download speeds of 8-15Mbps. It's not as great in all places as everyone thinks. And there are lots of times it is in the 5-8Mbps range. Sprint's LTE is competitive enough with Verizon, and when you consider unlimited data, then it is a wonderful thing. Besides, almost no one can tell the difference between 10Mbps and 30Mbps anyways, unless they are downloading very large files.
Robert