Well here is a contrarian view, for every negative there is a positive, my advise is read, read and read then make your own decision. An expert is x for unknown quantity and spurt is for a sudden impulse.
https://www.google.com.au/url?sa=t&...isse-2017-12&usg=AOvVaw0gE8CFi1HJOZFKvPiIUcrb