Apparently I am one of the lucky few to have so far been able to get an SR1911. Here are my initial impressions.
Pro
1. Price. I paid $725 + tax & shipping and for what the gun comes with that is a great price for a US made gun.
2. Visually very appealing if you like stainless steel. While it is a matter of personal taste I find the blued controls make the gun look unique in a good way. The grip panels are wood with Ruger emblems and really add a nice touch.
3. Fit & finish were very good. Virtually no slide to frame movement and everything lined up perfectly.
4. If you are partial to box stock 1911s then you won't like it. However, if you're into dressing it up a bit there's not much they haven't included. Comes with a beavertail grip safety, extended thumb safety, extended mag release & ventilated trigger. I can't verify this as I haven't checked yet but I have also read that the mainspring housing is steel rather than plastic.
5. Accuracy. This will vary from gun to gun but initial impressions were good. I put 10 shots into a 4" circle at 25 yards using 200 gr. SWC handloads and a PPC barricade for support. My friend who is a very good shot put 4 shots into 1" with a slight flyer which enlarged the group to 2".
6. Extras. Comes with two mags (an 8 shot and a 7 shot

), a bushing wrench and a soft pistol rug.
7. It's a series 70, not a series 80 which makes getting a good trigger pull easier.
Con
I can't point to any obvious cons like poor fit or finish or horrible trigger. Most of the cons would be due to personal preference items.
1. Unlike the Spartan it has fixed sights (Novak 3 dot). This is not a true con but could be for someone who wants adjustable.
2. Again not a true con but the stock trigger pull ran a tad over 5 pounds on my Lyman electronic trigger gauge. This is good enough for a lot of people but will not satsify those who want to do any sort of competition shooting. The trigger also has a very faint 'click' before the hammer drops but I haven't worked on it yet to see what's causing it.
3. It does not have a rail for light/laser mounting nor does it have forward slide serrations for those who prefer them.
4. I did have a couple of FTFs in the first 50 or 60 rounds. However, that was with fairly light SWC lead handloads. The next 150 rounds were glitch free so I attribute this to the gun needing a few rounds to smooth out.
My overall impressions are very favourable. I am partial to stainless so for me that puts the Ruger ahead of the Spartan although I would really have liked adjustable sights. I think that if these are the good sellers I expect them to be Ruger will offer adjustables down the road. They are also only currently available in 45 ACP but again I think 9mm and maybe 38 Super & 40 S&W versions will likely follow given their initial success. I also have an STI (Ranger II in 9mm) which I really like and I think the Spartan is a fine gun for the money but my personal taste puts the Ruger ahead of it. I don't think the Remington is in the ballpark with either of these given that the prices are close and the Spartan & ST1911 both have a lot more features although I did see a R1 recently at a CGN dealer for $500.
Hope this helps.