I do hate it when people compare blackberry phones to iPhones and android handsets! The blackberry is in a category of its own. You love it or hate it. I have an iphone 5, htc one and a galaxy note 2 at the time of writing (long story) however my blackberry is always the handset I never leave home without. I had the bold 9900 and upgraded to the z10. I didn't like it. For me blackberry is all about the physical keyboard. When the q10 appeared I just knew I would love it, and I do.
I purchased it in white from carphonewarehouse as amazon not stocked it just yet. I honestly love it. Yes it is most definitely a giant leap in software terms away from the bold, but give it a few days and you will see how advanced the software is. We all hate change right but this is going to be the way forward from blackberry so I guess it's best to embrace change rather than fight it. The keyboard is amazing. You will love it. The screen is fabulous too. One point. Don't change font size to above 9 as if you do then you can't see what you are texting beyond line 3! I am sure blackberry will sort this out shortly.
So if in doubt, buy. Give it a few days trial, then see how invaluable a device it becomes. Honest.