I bought my slim 2 last spring and it was great.  Recently I am having problems with the unit not spraying water.  The nozzle comes out but that's about it.  What I have found to help fix the problem sometimes is to shut off the water supply and flip the whole unit up.  There is a water pressure valve or cover that I have to open to release the pressure.  I lock that valve back and everything seems to work normally for a few days and I would repeat the cycle.

I can't really recommend this unit because of that.  I also have the bio bidet bb-600.  That unit is much older but still working well for me.