I am looking for a training aid to improved my off hand shooting for high power.  I was looking at SCATT and NOPTEC but really don't want to invest $1500.00.  MANTIS has some options for around $300.  I even saw an AR version of this called the Blackbeard?  Anyone have any experience with these?.

I just got a Strikeman laser system.  So far, so good.

I'm not a big fan of having to subscribe to something I already paid for, but the free version is acceptable.

It was $100

Does the strikeman record and show you your approach, wobble, shot placement, and post shot?

No, just the shot placement...at least in the free app.  They have more stuff of you pay more.

For $100...including the laser cartridge...it's a deal.  I shot 100 shots last night from my recliner.

Okay, thanks, I'm looking for something that will track the whole shot sequence

Used SCATT trainers show up regularly on the US Rifle Teams forum for about $800.

Get that. It’s the gold standard for a reason.

I have a Mantis X10 and a SCATT. The Mantis is a decent tool and I use it often for pistol dry fire, but it isn't sufficient for high power practice in my opinion. It just doesn't have the fidelity to give precise enough feedback. The Mantis could probably get you to putting all your shots in the black, but not get you to a clean score with a high X count.

The SCATT is the standard for a reason. Its the best. They're expensive, but I justified it in terms off trade off. For off hand especially its at least as valuable as live fire, if not more valuable because it shows trace and impact. Factory match ammo costs in excess of $1 a shot (especially in 2020 when I bought my SCATT), plus barrels at $500 a piece, never mind the gas and range fees, plus the time to get to/from the range. The break even point for the SCATT was less than 2000 trigger pulls. If I shoot 20 a day, that's 100 days of practice. It paid itself off in under two years.