Shogan.tech Suggestion

function Get-VMUsefulStats {
    [CmdletBinding()]
    param(
        [Parameter(Position=0,Mandatory=$true,HelpMessage="Name of the VM to fetch stats about",
        ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true)]
        [PsObject[]]$VMName
    )
    begin {
        [PsObject[]]$outputAry = @()
    }
    process {
        foreach ($VM in $VMName) {
            if ($VM.GetType().Name -eq [String]) {
                $VM = Get-VM $VMName
            }
            $VMHardwareVersion = $VM.Version
            $VMGuestOS = $VM.OSName
            $VMvCPUCount = $VM.NumCpu
            $VMMemShare = ($VM.ExtensionData.Config.ExtraConfig | ?{$_.Key -eq "sched.mem.pshare.enable"}).Value
            $VMMemoryMB = $VM.MemoryMB
            $VMMemReservation = $VM.ExtensionData.ResourceConfig.MemoryAllocation.Reservation
            $VMUsedSpace = [Math]::Round([Decimal]$VM.UsedSpaceGB,2)
            $VMProvisionedSpace = [Math]::Round([Decimal]$VM.ProvisionedSpaceGB,2)
            $VMPowerState = $VM.PowerState

            $vmOutput = New-Object -TypeName PSObject -Property @{
                Name = $VM.Name
                HW = $VMHardwareVersion
                VMGuestOS = $VMGuestOS
                vCPUCount = $VMvCPUCount
                MemoryMB = $VMMemoryMB
                MemoryReservation = $VMMemReservation
                MemSharing = $VMMemShare
                UsedSpaceGB = $VMUsedSpace
                ProvisionedGB = $VMProvisionedSpace
                PowerState = $VMPowerState
            }
            $outputAry = $outputAry + $vmOutput
        }
    }
    End {
        $outputAry
    }
}