I don't remember if it was the CyberKnife brand, but I've had SBRT twice — once post-op after the metastasised tumour was removed from my spine (20 gy spread over 5 days), and once to the prostate itself (60 gy spread over 20 days).

The procedure itself each day is quick and painless. There are some expected outcomes from radiation to the prostate, like losing the ability to ejaculate (your orgasms become dry), but otherwise, most people either have no side-effects, or mild ones that disappear in a few weeks or months

I was an exception, since I did end up with mild radiation cystitis (bladder irritation) that seems to be permanent. I should mention that since I have stage 4 we knew the cancer had already escaped the prostate, and they promised to "throw the kitchen sink at it"; your treatment might be more tightly targetted.

I suffered a few months of urge incontinence due to the irritation (and a couple of UTIs), but now I barely notice it unless I drink too much caffeine, alcohol, or carbonation together, or let myself get dehydrated. Definitely worth it, from my PoV.

Surgery wouldn't have made sense for me, because it wouldn't have dealt with any cancer that had spread just outside the prostate. Radiation (at the level I got) is as effective as surgery for the prostate itself, and also catches any adjacent spread.

I did not have SBRT (Cyberknife or Mridian/Elekta MRI guided), but had 25 IGRT sessions for recurrent cancer.
But many men “of age” do choose a 5 session treatment since the side effects are much less than surgery ( no recovery either) and the outcomes are the same.
I personally know men who’ve had it and they all give it a thumbs up.

I had Tulsa Pro in July. Painless and no incontinence or ED. No sign of cancer on my 6 month follow up. My experience: https://connect.mayoclinic.org/discussion/tulsa-pro-experience-mayo-clinic-mn-july-2024/

My brother had CyberKnife SBRT on his prostate two years ago and has been clear since then. The only problems he had were some urinary issues which were solved by taking flowmax for a few months.

You didn’t supply enough information to really get the best feedback. What was your Gleason score, What was your PSA when you had a biopsy? Was anything else found in your biopsy that you don’t mention? All of these things can be a factor in what your decision should be.

I’ve had CyberKnife to my spine to remove a metastasis. I’ve had seven weeks of radiation to my prostate bed, After surgery failed. I had absolutely no side effects to either one of those radiation treatments. Some people do have reactions, I just never had any.

You may have multiple choices, Here are some more non-radiation treatments. Cyberknife SBRT , HIFU , NanoKnife , Cryotherapy and TULSA-PRO. Many people in this forum have had Tulsa Pro and really like the results.