For us Macs are way more productive and crash far less. They can be just as slow to open as a PC it all depends on what software you instal and what sort of mess you keep your desktop in. I know people who swear their PC never crashes, and those that say they crash daily.
I use Photoshop and open huge layered files of 2 + gigs with no issues, but i have installed a minimum of 8 gigs RAM on most of our office Macs with more than 4 TB storage for each. If you use Photoshop or studio Pro and keep up to date with the current versions you will have little if any problems. Other software i cannot comment on
