Am I wasting my time with Unique Article Wizard?

I've been using UAW (unique article wizard) for about 6 weeks now. It's been very effective in building me backlinks and the service does what it says it'll do.

My issue isn't a matter of whether the service is worth the money or not, but it's more about the time that each article submission takes out of my day. After learning about the results the service gives me, you won't need to be an owner of the product to give your insight as to whether I'm making good use of my link building time by spending much of it on unique article wizard.

Each article submission, from beginning to end, takes about 30 minutes of my time (maybe 25 on a good day).

In my experience, the article is distributed to several hundred sites, a fraction (maybe 10%) of which show up in google search results if I run a search.

However, I'd say that only about 6-8 backlinks (on average) per article submission show up in Backlinkwatch, Yahoo Site Explorer, or any other backlink tracker. I've written articles with backlinks to at least 50 unique pages, so I can cite this average of 6-8 links per submission with confidence.

The sites my articles are being submitted to via UAW aren't exactly influential ones and I have to wonder if my time could be better spent with the freed up 30 minutes than it is with the 6-8 backlinks it gets me via UAW. I'm getting nice results with the service, but find that I have higher backlink quantities than sites that still outrank me, and I'm wondering if at least part of it has to do with the quality of links I'm getting out of UAW.

For example, in the 30 minutes spent with a UAW submission, I could make an extra (or stronger) linkwheel with SEnuke. I could spend it commenting on more blogs related to my niche. I could write an extra article or two to post on EzineArticles.

Of course, I use other means of building links as it is, but the UAW strategy takes out a nice little chunk of my day (I'm submitting at least 4 articles daily) and comprises most of the time I spend building backlinks. Perhaps I could automate some efforts more easily with $67/month and spend my freed up time doing other things to improve my SERPs?

Any thoughts or insight would be very much appreciated!