Conveyancers and Attorneys are now being faced at becoming "Business Managers" and as part of that, they should be treating any service provided to their firm the same as the purchase of any equipment / service. Ask for references! Get the person you are requesting to give you the breakdown in detail and in writing - no comebacks - and when you get the references - please check them - give that firm a ring and ask questions - not only of the Partner but also the users of the service / software - you'll get many and varied responses.
Most important one of them all - take your time in making a decision - don't let anyone help you to make a quick decision - you could find out its a hasty and incorrect decision.
Good luck!