That's a good savings, but it's going to be a lot noisier to walk on than a more expensive type. The higher priced ones deaden the sound of foot traffic considerably better. That's why they cost more.
Be sure that the floors are properly prepped, as in flat. Fill any low spots or sand any high spots to the manufacturers specs or you will regret it.
If the floor is not absolutely flat, the planks will flex slightly as you walk on the floor. That, over time can cause the joints to weaken and planks to move apart. The manufacturer will not warrantee that issue. Leave the proper gap around the perimeter too and especially at the door casings.... make sure the floor isn't locked in or binding at any point. It must have expansion.