Maybe this is not the proper forum for this, but I'd like to know, given the fact that the software is not quite free

, if it is worth buying it. I know that there is a 45 days free trial, but after I've looked into descriptions and watched some tutorials, I'm thinking that it implies a quite steep learning curve and 45 days may not be enough for me, PS manages to confuse me still after a year of casual use. To focus more the question, is in this software someting that I can't have using DSS and Photoshop ?
Thanks for your patience.
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Radu
Canon PowerShot S100
Canon 50D , SIGMA 10-20 f3.5 ,Canon EF 24-105 L IS USM, Canon EF 100/2.8 macro Canon EF 50/1.4 ,Canon EF 85 f1.8,Canon EF-S17-85 4-5.6 Old Tamron 28-300 inherited from my Canon Rebel G film camera
Canon580EXII
http://www.errre.net