On Blackfin Processor Programming

Hi,
I am using BF534 with many peripherals for my apllication... I am designing a board with Bf534 and several perpherals like ADC, DAC, LCD,SDRAM ,Flash memory, Buttons, VGA etc...........
I am controlling each of the peripherals using the processor...... I have built the interface conntrol source code for most of the peripherals......
But now I found that there is manual in Analog devices website called "Device drivers and Sytem sercvices for Blackfin processors"(Initially I found it difficult and so ignored it)...Now, I am not using that kind of programming for my application...... Is it OK??? I am dierctly programming the registers...For example
*pTIMER3_WIDTH =1000; //Program timer width register//
*pTIMER3_PERIOD=1000+7500; ///Program timer period register///

1) Which type of programming would be easier?
2)Which is more faster?
3)Is it OK if I continue in the same manner?
4)Which method is more efficient and ideal and used for controlling different perpherals?
5)How much time would I take more (in general) to learn and start programming based on the above mentioned device driver manual??

Thank you,
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Kind Regards,
Nithin K S