This review is based on past experience as this vendor's client, and with vendor's integrated spider-able IDX. It does not address their newer IFramed IDX product. My basic experience and comments are pretty much the same as the original reviewer, so I will not repeat all of that myself.

Some clarifications on features:
Email Blast / Drip Email: Yes to both. The drip email feature is pretty powerful, when implemented well by the client.
Alerts and Notifications: Email and Text are supported, and can be customized by vendor if needed.
Captures Referring URL: Yes. Available in each lead's "Tracked Visits" area in the back end.

REW also offers an optional, extra cost module that generates an IDX site map file for the SEs containing the urls for all IDX details pages. This module should be a standard feature, IMO, but it isn't. Clients may also request (at nominal extra programming cost) custom SEO tags for the IDX details pages, such as Title and Description and Keywords, that can be auto-generated from the IDX contents for that listing. Every client should do this, as it can make a big difference in SEO performance.

REW has been focusing its recent efforts on its newer Limited Edition Custom (LEC) websites, which generally include a version of their spider-able IDX. The IDX can be their "core" IDX for a particular market, or a totally customized implementation if the local MLS rules permit and the client desires. When implemented properly, and followed up with good basic SEO practices on the part of the website owner, this combination generally does very well in the search engine results in many markets, and can yield very good ROI when it does. REW has also implemented their IDX solutions in many different markets, and has a lot of experience in this area.

As one of the first in the market to offer a SE spider-able IDX, REW's IDX product has done very well, and has gained many avid supporters. However, as mentioned by the original reviewer, total cost of ownership can be very high compared to other IDX products, especially initial implementation cost when combined with one of their LEC website products, and especially if you need any kind of customizations done. Because each client's website and IDX is in fact a totally independent code set implementation, and is not shared with other clients, each client will also be responsible for paying for any future IDX programming changes, as may be necessary due to IDX feed contents or functionality changes by the client's Board or MLS. They will also need to pay for any upgrades as REW improves its IDX and other CMS features, because whatever features the client originally buys are forever static, except for bug fixes, and the client's website will not get any upgrades or new features unless they are paid for on a case-by-case basis. This makes the long term cost of ownership somewhat of an uncertainty.

Since the look and feel of the IDX can vary greatly, depending on the "core" IDX for that market, client customizations, and whether the IDX is integrated with a REW template or a newer LEC or custom website, the look and feel and end user experience cannot be rated in any generalized way. The look and feel and end user experience can be weak and terrible on one website, and totally awesome on another, depending in the client's implementation and customizations.

The IDX lead management back end is tightly integrated with the vendor's CMS, and the combination can be somewhat difficult to learn at first. But it has some great capabilities once you do. I still ranked the ease of use a bit better than the original reviewer because I have seen and experienced much more difficult to use back ends in other products.

If you select REW website and IDX, and even if you pay big bucks for major customizations, you do not "own" the resulting code, and the end result is not transportable to any other hosting service. As a result, you will be "married" to the vendor in a big way, and will need to carefully consider the ramifications of that decision. However, their CMS back end does allow you to export your leads, and to export a MySQL backup file of your CMS content pages, so those are yours to take with you if you ever need to at some point. When I switched platforms and vendors, I was able to manipulate and load the MySQL backup file of 300+ pages from my REW site into a Joomla 1.5 database. With some effort and/or technical help, one could probably do the same for Word Press, as it is also MySQL based. However, even if you can do that, the menus and navigation structures would still need to be re-built, and other functionality accomplished with appropriate plug-ins.