Giving it 1 star to highlight that this trail doesn't really exist. You cannot get through to the starting point; it goes through a gated community.
Then, as noted in another review, there are no hot springs.
This being said, if you head to the regular Agua Caliente trail, it is great. Really nice views of the valley (and yes, trail is not best from March to October ... way too hot, as I found out yesterday).
So in summary, pretty much everything in this trail description needs to be updated :)