I have SSD, and it is do-able. There is a lot of paperwork, especially at the beginning, but I believe it is worth the effort.
The people there at the office are there to help you, and if your condition significantly improves with new treatment you can always start back to work. The SSD doesn't just stop, but allows trial-runs to make sure that you will be successful in the place. If you need retraining for a new line of work, they pay for that.
If you get a SS lawyer it cuts down on a LOT of paperwork, but they take a portion of the "back pay" and can take up to $6,000 of the back pay. By law they cannot take payments outside of the back pay award and cannot take any portion of future payments.
Most people wait till after the first hearing to hire a lawyer in case they are approved without the lawyer, but that is the hearing where the most paperwork happens too.
Many of us here have SSD or are trying for it. for me, it took 18 months from filing the claim to being approved, and then another 9 months for the paperwork and back pay to finally be done.
My SSD is based on my bipolar condition and how CP makes it VERY hard to manage. With conditions that are visible, testable, and are normally not treatable I'm sure the process is easier. My condition is invisible, has no definable test, and is normally able to treat and live a "normal" functional life. I just happen to be the exception.
Treatments: gluten-free diet, Cpap
Medications: omeprazole, probiotic caps; multi-vitamin supplement; docusate sodium, fiber chews; zertec, ferrous sulfate, cymbalta, lamotrigine, ambien, alprazolam, plaquinil, sulfasalazine, methotrexate, leucovorin calicium, folic acid, motrin, tramadol, pennsaid, aspercream, nasonex, albuterol sulfate inhaler