The Sportcraft TX400 does not come highly recommended. The quality of the machine has been called into question, which is in part a result of their low price. "It is very hard to make a machine in the price range they are targeting," according to Treadmill Doctor.
The Sportcraft TX400 is primarily sold at Wal-Mart. Their treadmills have been recalled twice for "unexpectedly accelerating," as noted by the Consumer Product Safety Commission. This particular model was not recalled, and is considered better than other Sportcraft products. However, it is considerably less well-received than similar products from Pacemaster and Lifefitness.
As of 2012, Sportcraft no longer makes treadmills, so this product can most likely only be purchased pre-owned.