401(k) loan to fund real estate purchase

[Charlie Gruber]

Wanted to start thread on pros/cons on using a 401(k) loan to finance real estate purchase.  From the research I've done (links below) sounds like a bad idea but curious if anyone has different perspective.

Research links:

https://www.fidelity.com/viewpoints/retirement/be-cautious-about-401k-loans

http://www.bankrate.com/finance/retirement/4-reasons-to-take-out-a-401k-loan-1.aspx

http://www.marketwatch.com/story/avoid-the-temptation-of-dipping-into-your-401k-2015-06-04

Online calculator to analyze cost of 401k loan: 

http://www.marketwatch.com/story/avoid-the-temptation-of-dipping-into-your-401k-2015-06-04

Thanks all!
-Charlie