Reglazing tile vs. replacing tile - what are your thoughts? (Before + After Pics)

[Jake Andronico]

I have 2 SFR's that I rent to students in Reno, NV.

They are older 1970's homes, and it would be very costly to fully redo the bathrooms. 

So, I opted for a reglazing of the shower tile for now. 

The individual that did it said they typically last 2-10 years (super wide estimated range) depending on the chemicals that come in contact with the reglazed surface and a few other factors. 

Curious to hear if anyone else has done this, and if so, what their experience was. 

Before/after pic below. Thanks!!