Hi
I have a Ryobi 30cc power unit wi strimmer + the following Soneva attachments - brush cutter, long reach chainsaw and hedgetrimmer.
Brushcutter fine, the long reach chainsaw and hedgetrimmer can be quite heavy once they have been held for a while. My view is that they are OK for intermittent use as they provide a competitive option to either hiring or buying each item, but not for day in day out use.