A revised feedback after a long testing period.
Verdict: piece of junk in most cases unfortunately.
I had different feeling about it with some moments of excitment also but in the end it is what it is. The unit might do the job but diffusers are well to fragile. Damn the things you cannot do with your tank when twinstar is in are way too many. Dont dose iron, dont do that and that etc. And at about 50-60£ for a replacement diffuser? Come on. It will only help a little and only with green algae in my opinion. Nothing that a better balance would not do.
Way too expensive also. Only people who can understand and perhaps appreciate it would be experienced scapers.
Sadly I say no at this point but keep a right to change my opinion later
As I said I did think its good at some moments. I have only tested it on larger tanks. Perhaps it does better on the 60cm.