Open enrollment is over for 2015 so even if you want to get in to the Affordable Health Care Program you may need to wait until next year. I believe open enrollment starts in November (possibly the 15th)and ends Feb 15. If you wish for coverage to begin Jan 1 you must enroll before Dec 15, otherwise in general you must enroll by 15th of prior month of when coverage begins.
Whether or not it is worth while varies quite a bit and your income level does make a difference in how much you need to contribute and how much the program contributes for you. You will find actual insurance premiums are still in similar price ranges as they were before - it is just who pays what percentage is one big change. Also your health history may be a factor in whether you can afford private insurance or if AHCP is a better option. If you have a serious condition - you may have a hard time getting your own insurance at an affordable rate - but the AHCP plans still have to cover you.
If you have children or other dependents under 19 - they will not be covered by AHCP - unless they fail to qualify for medicaid or CHIP (childrens health insurance program which is under state medicare programs AFAIK) but you must try to enroll them in those programs first.
If you go to open enrollment site (may have to wait until november to do this since open enrollment is done for 2015) you can put in some of your information, doesn't even need be totally accurate just in the ballpark, and you get a list of policies and what it is estimated they will cost you out of pocket immediately, and you can easily start to see what your options are. You may find policies as low as $20 a month up to several hundred a month - they all have different deductibles, limitations, copays, types of services that are covered, etc.
If you submit the information with estimated income or other figures you still likely get the insurance at the rates that were quoted, but if you were way off with your estimated income or other figures, you may owe some extra money after the year and you file your tax return. You may also end up with more credits then you used - that can be applied to the next year or possibly even refunded to you (I'd need to verify this information), but I know it works somewhat similar to paying your income tax - if you don't pay enough during the year you will owe the balance when you file, if you pay too much you will have a credit, and if you don't want to have to pay a large bill at the end of the period you need to keep track of where you are and have adjustments made, which in this case essentially changes what your out of pocket insurance premium is each month.
Right or wrong (this starts to get political so I will not say much other then a few basic facts) - insurance companies still get to sell policies though they may have more restrictions on who or what they must cover in some instances where they could refuse to cover some of those in the past, people that could not afford or even get insurance before can have insurance, uncle Sam is paying a portion of their premium depending on income and other factors. Some users are very happy with what they have, some not so happy. It is hard to develop such a plan that would make everyone happy, but you do not have to use this plan either.
I enrolled this year, went from paying about $800 monthly for a high deductible plan, no copays, no prescription coverages and even some limitations on what services are covered to a plan that only costs about $120 from my pocket monthly, has lower deductible, does have copays and some prescription coverages. Looks much better then what I had now, but we will see how it turns out after the entire year is over before I will say much more on how good or bad it is for me.