Bought on offer with a Tanaka strimmer, (Tanaka TCG-24EAS Line Trimmer) at an excellent price and the two pair up really well, the strimmer is not too weighty and is plenty powerful enough for this trimmer.
The trimmer is excellent quality, far better than the Mitox quick change system that I have been borrowing from the father in law (Mitox, not bad, just not up to Tanaka standard).
I went with this system as, even though it is a bit fiddly to change the head, it really only takes a minute and I then have a spare strimmer power unit if my dedicated strimmer (another Tanaka) should ever be out of commission. I can then interchange the heads. I also have the chainsaw head, excellent.
You will not go wrong buying this unit and having used it now for a number of jobs I am really pleased with its quality. Tanaka, brilliant, better than Stihl ( Except their chainsaws).