How easy is it to book resorts and exchange within the VRI network? How are the quality of the resorts??
As correctly noted in the posts above, VRI*ety (the former internal trading program accessible exclusively by owners at VRI-managed resorts) no longer even exists at all, having essentially been completely "absorbed" into Trading Places International (TPI) during the past year.
VRI-managed resorts are generally older properties, independent of any "chain", well located and well managed but certainly not fancy.
Truth to tell, TPI was
always the "platform" operating behind the scenes for VRI*ety exchanges anyhow, merely separating out the VRI-managed resort inventory (at approximately 125 resorts) for exchange access only by owners at VRI-managed resorts. No longer the case.
Now, all of the exchange inventory of VRI-managed resorts is simply placed into the same "pot" with all of the other TPI inventory; owners at VRI-managed resorts no longer have any exclusive access (or any other exchange priority) in the new post-VRI*ety "one pot" system of TPI. This change was made during the past year and was entirely predictable, maybe even inevitable, after the ILG acquisitions.
VRI underwent some "streamlining" after its' acquisition by ILG. For example, there used to be regional VRI offices (Northeast, Southeast, etc.), but all regional VRI offices were closed down after the ILG acquisition. Everything VRI-related (except for on-site management of individual resorts, of course) is now run out of VRI's HQ location in California.
Although primarily a management company (and generally a very capable one, in my own experience and observation), VRI will also conduct (somewhat overpriced, IMnsHO) rentals on behalf of owners at VRI-managed properties (for a hefty commission, of course). Someone seeking to rent directly from VRI at a VRI-manged resort in Florida, for example, will still have to deal with VRI HQ in California to do so. VRI's rental prices (plus any applicable state or local taxes) are high enough to always make "direct-from-owner" rentals more attractive and less expensive.
P.S. to OP: You asked about VRI association with RCI or II. At the corporate level, there is none. Exchange company affiliation is decided by the individual resort HOA,
not by VRI. A VRI-managed resort can be affiliated with either RCI or II --- or both; VRI really has no say in the matter.