I had a similar one (from Machine Mart) and eventually sold it to buy a professional tower.
They're fine for light decorating work, when erected at lower heights or indoors. The 7m tower they show outside would be pushing it.
You have to decide on whether you have a wind-sheltered location and firm flat footings for the tower, the height you will need, how much weight you'll put on it - and the degree of instability and flimsiness you're willing to put up with.
The upside is that a shorter tower is very easy to move fully assembled.
Hiring professional towers when you need them is relatively inexpensive, if you have access to a suitable vehicle to transport them.