You'll find some good threads on this if you search.
I used the 7 days trial recently almost continuously for the 7 day trial.
The quality of the backlinks was VERY low.
You will need to use proxies. I also used the nohands proxies trial but I fouind many of the Google safe proxies failed immediately. It was more effective to keep searching for them online and inputting manually.
I'm not going to argue whether people find GSA better than NHSEO or not, that is entirely up to their opinion, the fact is they both have their strengths and to say GSA is outright better than NHSEO in every way (which is stated often) is simply not true.
To take that further and say that the links NHSEO generates is VERY LOW is also totally false, if quality is your consideration simply use the quality controls at your disposal. You can set quality by PR, OBL, Alexa Rank, and Mozrank DA/PA and even disable all nofollow platforms if that is a concern.
Also to say the proxies in
No Hands Proxies is terrible and you are better off manually downloading lists and using them, you have to be kidding there. Check out the latest page on the sales thread and count how many positive reviews there have been in the 3 pages of the sales thread so far, check
this post alone for a short selection of some of the reviews from this forum alone.
Again my intention is not to rag on any other software but there are differences in all software and zebrahat is right that there have been plenty of threads from trusted members showing their rankings using just NHSEO so it is definitely still effective, still incredibly easy to use and is being improved very regularly.