I want to get one and I see the hand held trigger type which use vacuum vs. the tank pressure type like made by Motive

 

I like the tank type but I have heard of issues trying to get them to seal properly on the M cylinder

Would like to hear user opinions

thanks 

I use the Mighty Vac.  Attaches to the bleeder valve at the wheel.  It works great.  One-man brake job.

I use one of those little hoses with the check valve.