I calibrate the production chain and in principle a week before each shoot. If the light in the studio, the SpyderCube is used, typically a color chart (X-Rite - this is really not the case?). Outdoor must satisfy a 3-zone gray card, morning and evening partly repeated every 5-10 minutes. Sounds a bit cumbersome, but later on the computer saves a lot of time.
The match at the newly calibrated with the Spyder4Elite Monitor, on Mac a breeze and quickly done with a few mouse clicks.
Proofs succeed now reliably thanks SpyderPRINT and the result in the final print does not pose any more nasty surprises - absolutely no comparison to the earlier days of the usual back-and-forth with the printers, to the nuances voted.
Once purchased, the Spyder Studio is professional application immediately indispensable and has - by saving time & increased productivity - quickly pays for itself.