With all the tricked out, overblown, synthetic, whiz bang crap on the market, this is still the all around best design along with long lasting METAL.  I have one that is at least 30 years old.  The best part? you can operate it mostly with one hand.  Who thinks it is a good idea to put those fussy little PLASTIC on/off levers on things????. some are so small they are  hard to pinch and stiff to turn especially if you have grip issues.  This one you just release the handle lever and it stops.. no muss no fuss.  You can put it down without having to twist and/or struggle to turn it off.  It is ready to spray again with simple hand pressure .. again .. no wrestling or twisting required.