Combination of these 2 books quite powerful. It did changed my perception of owning stuff and happiness. Owning too many stuff might hinder productivity & taken up many of your time.
If you have less stuff, cleaning & organization will be easier too. Since the 1st book is in the extreme side of minimalist, the 2nd book is more suitable for most ppl I believe.
It did help me with my purchase decision & reduced clutter, however I occasionally still fail to prevent unreasonable & unnecessary purchase