Solid ground needed.. very short loop with the inductor and the diode... the diode leads are too long and the diode has poor performance... yes, it's listed in datasheet as OK, but just OK... for the cases where someone needs to use leaded components. Doesn't mean the peak efficiency mentioned in datasheet is done with such a diode.
Capacitors have to be low esr ... Nichicon HE is lowish esr (about 0.2 ohm is not very low esr these days ) but for this application, tantalum, polymer or ceramic are more suitable.