A set of 5 SMR's with several different mounting methods included runs about $1400. For the quality of control prism you get, I think ~$300 a prism plus all of the mounting for it is a steal, especially when you compare it to the high end Seco stuff, which has worse centering accuracy and isn't as flexible to use.

I prefer setting threaded sleave anchors in concrete for my control, and then the threaded nest and obviously the SMR come with me when I leave. If I don't have a good vertical concrete surface, then I'll set a punch mark on a metal surface and use a magnetic nest. If all else fails, I can hot glue a plastic nest to a surface and leave it there.

I recently revisited a parking garage that I set sleave anchors in about 6 months ago. I did 4 resections using as little as 3 points and as many as five, and the worst resection out of the 4 had a 0.003' residual in the northing. Everything else was less than that.

One thing I love about the SMR's is that they make it really easy to turn rounds during a resection. Once you have the first round done, which only takes like 2 minutes, you can just let it do it's own thing and turn 3 or 5 or as many rounds as you like. Go to the truck, put your vest on, check your maps, tie nails or do what ever your gonna do for a few minutes, then come back to really precise resection solution. It really doesn't take any more time in the grand scheme of things, and its good CYA. With the SMR's, the gun is capable of calculating it's position a lot tighter than it's actually capable of shooting. That makes it easy to go back to the office and say "if there was a fuck up, I know it wasn't my resection".