I remember looking this up and doing some research when they had it on sale a couple of years ago.
Probably the biggest drawback of this set is the lack of a reservoir tank to help keep airflow consistant, not having any direct response to the pump.
there are a couple alternatives here and here that have that feature.
they are still cheap pumps, like the one at Aldi, so probably not as good as something you spend 400 or $500 on but for the amount of spray work I'll ever do any one of the 3 would do the job.