The EFX 5.21 won't give you the features you can get from NordicTrack, but NordicTrack won't give you the quality.
The opening model of Precor's high quality lineup. The EFX 5.21 gives you all the Precor quality that you expect for a very reasonable value. Just be warned, you will receive none of the features that you will get from brands like NordicTrack. Then again they won't give you the quality that Precor will.