oh yes- have to advise the cliff is the 'best'- honestly, they are all great in Bonaire and each has their own special things. For me- i love the cliff as it seems a little different from the other locations- its like a mini-wall (very mini) and averages at 50-60, so nothing deep.
If you want to do deeper reefs, go for the double reef system - the lake, angel etc near to the Hilma Hooker. Although not super deep- the double reef bottoms out at about 90 between the systems ( lots of garden eels) and the outer reef slopes off into the dark blue.
enjoy- you will find it hard not to.