Windows anti virus & malware

Sage advice "don't run 2 AV programs simultaneously" is now being challenged by Malwarebytes 3
I noticed that Malwarebytes v3 Premium claims to run concurrently with other AV programs. Being a long time satisfied user of their free offering I decided to test it. I believe that no one security product is capable of catching EVERY threat

My system:
* HP Desktop - 8x Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz
* Memory 12GB
* ATA INTEL SSDSA2M160 - Windows 7
* ATA ST31000528AS - 500MB Linux, 500MB Data
* eSATA 1 TB - Data
* Windows Defender (MSE)

Findings thus far:
* Installed 3.1.2 Premium trial on 5/16
* no account creation required
* no email info required
* 14 day free full protection $39.99 per year per PC
* reverts to reduced coverage if no license purchased during the trial period
* drive scan is really fast
    <2 sec for first c:\ scan
    15 min for 1 TB ata
    15 min for 1 TB esata
    8 sec for a memory scan
        MB doesn’t scan NAS
* Daily update times:
    MB 10 seconds
    WD 41 seconds
* Scan of directory containing 4,760 files in 118 folders (52.6 GB) - times reported by app:
    WD 51 sec
    MB 6 min 46 sec

If trial continues with positive results while running both MSE & MB simultaneously I plan on purchasing a license.