The Residential Landlords Association has described new measures to regulate the rental market as "a bureaucratic nightmare".
The measures include increasing the rent review period from one to two years - meaning anybody who faced a rent increase in 2015, will now not have a rent review until 2017.
Other changes will see landlords having to give more notice if they want to change rent levels or terminate a tenancy.
There's been a broadly positive response from homeless and housing charities.
But speaking on the Last Word, Fintan McNamara of the Residential Landlords Association said the package is bad news for his members:
Meanwhile, Environment Minister Alan Kelly has been defending the package. He says it gives tenants greater security and stability:
