I attended this for my grandmother-in-law. Depends on how 'involved' in the culture you are. I'm "all in" for Cambodia (coming up to 15 years), so it was an easy decision for me, and the experience was definitely different - all my own grandparents died in a hospital and no grand-kids were anywhere near. There is the awkward floor sitting phase, you can't avoid it, but also you will get a break to move around if you need one; you can cede your position for somebody else to take their turn, etc. I wasn't forced to sit there for ages like at my wedding. Cleansing the body was definitely odd, just wet towels on hands, arms, legs, etc - but I found that quite cathartic; definitely an emotional moment, but also very "closing" which I didn't ever have with my own grandparents.

If you're the type who's popped in, grabbed a bride with the ambition of moving "back home", then maybe it isn't for you and you could well avoid it.