With any MLM, you will need to list and evaluate your own needs and compare them against the products "out there." Besides the technical issues, don't forget to include the other issues e.g., (responsive and accurate) support (both from the vendor, the licensees, and the users), the longevity of the company, the quality and type of documentation, the quality of the features and its platform independence, the implications on your staff, servers, and network. Recent MLMs that I've experienced seem to be (attempted) knockoffs (of the ideas) of L-Soft's technology. Yes, some have features that I wish were in current versions of LISTSERV(R); then again L-Soft is working on implementation of 1.8d with new features (as documented in LSTOWN-L and other L-Soft lists) e.g., I really like the HTTP interface to list maintenance, as well as providing a read/write list participation (via HTTP). At least one other MLM has a Window's-based download app that I found in adequate. /Pete