So buggy and so slow!!!

I was trying to do a very simple thing. I had to create a project in the past and had to create some tasks. I was not able to set the project start AND end date. Also when i entered date 03-10-16 the task is shown ending on 04-10-16. When i tried to change the date many times i got an animation in the date field and the dates were randomly changing where omniplan just hang... Overall the performance is too low. And these are even the BASIC FUNCTIONS only.
Very bad overall impression for such a high price...

Jip_ about OmniPlan 3, v3.5