The hike to these cascades was well worth the effort!
In total about 1-1:20mins to walk from bus to the pools (I walk pretty fast and did 1hour).
Directions - it's not the most clearly laid path, but it's not overly difficult and will probably be people to follow...
Take bus Q from calle Junin outside of mercado, go until the last stop (about 30mins?). Walk about 50m down the road and turn right, follow this for about 200m to a T intersection and turn Left onto a main dirt road. Follow this straight (straight!) for a while, about 20mins, past little tiendas and restaurants, until a 4 way intersection where straight is a dead end. Turn right and following this road as it curves around left and then right again (you will pass a red tienda called tienda siete cascadas). In front of you the road sort of ends at some houses, but there is a path to the right which takes you to the gorge in the distance. You walk downhill for about 10mons to dry river bed which is maybe Y shaped. A path continues straight ahead b/w the 2 forward river beds. Follow this path in the (right) river bed for about 5mins as you will reach the first pools.
Pools 1-2 are dirty. You har to climb a little to 3-4, the up over more rocks to 5-6, then to get to the last pool follow a path on the right which goes into the bushes and you appear at the top of the cascade at the last pool. You can also climb the last cascade to a set of small streams where there are some small pools for a few people. Unlikely that anybody else will be at these. This last ascend/descend is the most challenging.
Well worth the walk/sun for a few hours of relaxation and peace at the top.