I just bought a magneto speed sporter as well....wanted to save up for a lab radar....but with two kids and a wife it just wasn't happening. Heck, I'm gonna be in the dog house when she finds out about this $180 purchase!!!
Everything I have seen says this is the best next to a lab radar.
I think the only drawback of the MS is that it can(not always) change your groups. Sometimes it changes the POI, opens up the groups a bit, sometimes it does nothing.
Labradar doesn't do that but costs much more so it depends on how much you use it. Even when load development is over I still use it just to track velocity in various temperatures, etc. The more info I can get is a good thing.
My buddy bought a magneto speed and we used it for the first time yesterday. It was unbelievably easy to setup/use and gave readings on every single shot. My favorite part was that he paid for it and I got to use it.
There are expensive chronographs, and there are Cheep chronographs.
the Magneto Speed is in the middle and very user friendly it is also very accurate. I have a Ohler 35 p and a Magneto speed and I find my self using the MS more often because of convenience.
I have the MS V3 and like everyone has said it's pretty sweet. A great tool to have and very simple to use. I have not used mine a bunch yet but what I've noticed is on my CA Ridgeline 6.5 creedmoor the accuracy did not change at all but POI did shift 2 MOA high at 100 yards. Mounted on my Cooper Jackson long range 6.5-284 the group's opened up a bit and POI was also a little high. Just my limited experience so far
Although I have never used one, the Labradar looks to be the most convenient. I've owned two Chronys, and managed several times to shoot the front panel and the wires that hold the diffusers above the electric eye. And at the range one time I watched a guy having a lot of trouble mounting his Magneto Speed to his barrel. The idea of having a Chronograph that sits on the bench beside me and does not need to be carefully lined up is very appealing. Downside is they are pricey. Other than that, Labradar looks like the way to go.