What you need to do is look at what you want to achieve. I guess from the questions you want to be able to do lighting and maybe heating control.
Once you have written down what you want to achieve then start looking at the systems available. Its a bit like buying a car, you don't just buy the first car you see, you normally have a list of requirements and normally its the car that ticks the most boxes for the budget available. Well its the same with home automation.
Some other systems to look at:
Loxone (standalone only needs a pc during programming). Has various expansion modules so you can expand as needed when you need to. So you can start off small.
Idratek Does require a PC running all the time, but has a kind of failsafe mode should the PC crash or fail, so you can still operate the lights etc.
There are other systems like Insteon, PLCBus (there is a homeseer plugin for this), Z-wave.
If you are planning a big system install, try and do it in stages. Get one stage working before moving on to the next, that way if you have a problem you know that there is a 90% chance its the stage just installed. I know people who have spent 6 months between stages, and complete a stage as and when budget allows.
This has probably thrown up more questions.
Remember the only silly question is the question thats not asked.