I believe it's definitely helpful, though I started through a 'spiritualist' group. I loved it at first, they pay a lot of attention to the aesthetic and everything about the place is intentionally calming, with low lighting levels and a minimum of harsh noises (the exception being a bell used during an introduction ceremony to each week's program.)
When I first started going a couple of people warned me about the place (the word cult was thrown around,) and indeed after a bit of research I came across vile allegations made against the 'founding father' of the movement which carried a lot of compelling anecdotal evidence.
I immediately backed out and had no contact with the place for months, until a friend who lived there called me and I started going back. Over time I started to feel a sense of unease with the place again, never having forgotten what I'd learned about one of the men who is held in very high regard there.
It was clear to me that a lot of people were repressing their concerns with the place, the amount of their free time they spent doing 'selfless service,' and so on in pursuit of 'enlightenment,' ie being a good little peon and worshipping the guru etc etc... After a point I couldn't do it.
I can't reconcile the lesson taught there over and over again that we, as individuals, are our own 'higher power,' that God dwells 'within us as us,' with the idea of serving somebody else to 'realise their divine potential...' It makes no sense!! Uh-oh, here comes the cynicism 
After realising that, despite loving the atmosphere and a lot of the people that go there, it simply doesn't jive with my belief system; that there would always be a divide between my beliefs and those of the group at large (would you believe I felt like an outsider?) I stopped going for good.
Long story short, it recently came to light that the guy who runs the place has been having super-special secret divine Tantric sex with a select group (of over 20,) women over the last 2+ decades... I feel that my intuition (not to mention my lovely friends who warned me in the first place,) proved correct and thankfully I didn't build an attachment to that man or the place itself.
The point of my post is as such- be wary of spiritualist groups led by a single, charismatic entity, and not just on account of ones' Aspergers. I know at least one other Aspie who goes there who I've kept in touch with, but the vast majority of people there are, of course, not on the spectrum, and they have been just as susceptible to the manipulation that occurs in such a situation. So many people never spoke up because they thought it would ruin their chances at ending the cycle of death and rebirth associated with that particular form of Hinduism...
Ech, I keep novelising this
I haven't really spoken to too many people about it so it's good to get this out. The issue I have is that my view of meditation has been twisted slightly by this group. I'm having trouble returning to practice, though it's pretty obvious that I really should given that the amount of involuntary movements and vocalisations I exhibit have increased tenfold at work and in public over the last few months.
If I could start the practice again without the 'woo-woo' spiritualist mumbo jumbo I definitely would; it's been interesting being on the periphery of this particular implosion but it's definitely made me dislike the idea of spirituality, and see it more and more as a tool used to take control of/money from the gullible... I'm sure this isn't entirely the case but it's hard to break through that thought!
_________________
How did I get here tonight? What am I doing here?
How did I reach this state? How did I lose my sight?
I'm lost! I'm freaking! And everybody knows!
Everyone's watching!
So here... Are my hopes and aspirations
Nothing but puke
God, I'm so loooooonelaaaaaaayyyy
*power stance, air guitar*