A really good inventory is absolutely essential nowadays and landlords who are taken to adjudication by their tenants will have little chance of winning without one.
A good letting agency will often have staff specially trained to do this work and will usually be able to do a much better job than you can.
There is also the advantage that if the matter ever does go to arbitration, the fact the inventory was drafted up by an independent third party ( your agent ) will often mean that it is given greater weight by an adjudicator than one that was drafted up by you, the landlord.
Your agent will also deal with protecting the deposit properly, making sure that all proper information is given to the tenant within the time limits.
