I also must applaud the folks at Rent Check for the services they provide! I have been with them for some 7 years now and have also participated in the development of the site.
Access is the best part. It is totally web based, and covers both Credit offices in Canada, an excellent tenant profile service - the now mandated input from every tenant being screened forces the profiles to be more up to date -, and also provides commercial and criminal checking - something that most of the group may not need, but as a former apartment owner was very nice to have access too!
Price is good. Especially after you say that you belong to REIN, or some of the other landlord groups/owners associations.
If you have not joined yet, do yourself and your business a big favour, and join.
Cheers!