2 - 4 horas
no problem, just wanted a second ssd drive.
the repair went very smoothly, i have no experience with mac upgrades but the installation guild was very easy to follow and now the mac run's a lot quicker. Very happy with the delivery. 40 hours after i bought the kit it was on my door step in the uk. thank you ifixit.
just take your time, theres no rush during the install.