PROS
1. BlackBerry HUB.
2. Intuitive UI.
3. Ultimate security.
4. Built-in MDM ready.
5. BlackBerry Balance for BYOD.
6. HTML5 best in class + Flash.
7. Real multi-OS, featuring true micro kernel powered by QNX neutrino.

Cons
1. No Skype & WhatsApp.
2. No NetFlix support.
3. Long reboot.

Summary

The Z10 is a slick smartphone, made of textured plastic that is comfortable to hold and Apple-like in its simple design. The 4.2-inch screen is sharp, though middle of the pack in size, larger than an iPhone's and smaller than the popular Samsung Galaxy devices running Android.

Although BlackBerry promotes the device as perfect for one-handed thumb-centric use, the truth is the screen is too large for most people's hands to reach the top; plus, I found that thumb taps were often ignored by the touchscreen. The culprit seems to be angle: The screen is quite good at detecting direct, straight-down taps such as from our index finger when holding the device with one hand and tapping with the other. Directly down thumb taps are also registered, but those that come in at 45-degree or shallower angles often are not.

The hardware specs are comparable to those of other quality smartphones, though the mono speaker is a bit "breathy" and flat compared to the iPhone 5's. The battery is replaceable, which is important given the so-so battery life; you'll get a workday's use, as with most Android smartphones, but not the two-day life typical of an iPhone. You can add an SD card for increased storage beyond the 11.4GB of available capacity on the device, such as to store media files.

READ ALSO : http://www.nairacoded.com/how-to-differentiate-blackberry-phones/

Actually, in response to your cons, I can tell you that z10 ofcourse supports whatsapp. You only need to upgrade your OS to any version from 10.0.10 upwards (incase the version on your z10 is still the old 10.0.9 series.

Then when you say Long reboot, you should state what you are comparing it with. In comparison with bold5, z10 loads way faster.