Camera Capture using XLabs

Hi I'm trying to implement a camera capture using XLabs. I've follows the examples but there seems to only be part of the code necessary (unless there's a complete solution I'm missing on Github!?)

I have the camera showing and it seems to populate MyImageSource with something, however it never appears on my screen.

Any help would be greatly appreciated as this is for a commercial app due on Thursday

XAML:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:controls="clr-namespace:MPL.StockCheck.MobileUI.Controls;assembly=MPL.StockCheck.MobileUI"
             xmlns:mobileUi="clr-namespace:MPL.StockCheck.MobileUI.Helpers;assembly=MPL.StockCheck.MobileUI"
             xmlns:mobileUi1="clr-namespace:MPL.StockCheck.MobileUI;assembly=MPL.StockCheck.MobileUI"
             x:Class="MPL.StockCheck.MobileUI.Views.FormDetailView" x:Name="Page"
             Title="{Binding Title}">
  <ContentPage.Resources>
    <ResourceDictionary>
      <mobileUi1:PageStorage x:Key="PageStorage" Page="{x:Reference Page}"/>
    </ResourceDictionary>
  </ContentPage.Resources>
  <ContentPage.ToolbarItems>
    <!--<ToolbarItem Name="Sync Data" Order="Primary" Priority="0" Icon="refresh.png" />-->
  </ContentPage.ToolbarItems>
  <Grid HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" IsEnabled="{Binding EnableModifications}">
    <Grid.RowDefinitions>
      <RowDefinition Height="*" />
      <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>

    <StackLayout Grid.Row="0" Orientation="Vertical" Spacing="5" Padding="5" HorizontalOptions="FillAndExpand">
      <Entry Text="" Placeholder="Some Text" HorizontalOptions="FillAndExpand" />

      <Picker x:Name="Picker1" HorizontalOptions="FillAndExpand" SelectedIndex="1">
        <Picker.Items>
          <x:String>1</x:String>
          <x:String>2</x:String>
          <x:String>3</x:String>
          <x:String>4</x:String>
          <x:String>5</x:String>
        </Picker.Items>
      </Picker>
      <Switch IsToggled="True" HorizontalOptions="FillAndExpand" />
      <Button Text="Take Picture" IsEnabled="True" BackgroundColor="{x:Static mobileUi:Color.XfBlue}" TextColor="White" HorizontalOptions="FillAndExpand" Command="{Binding TakePictureCommand}"/>
      <Image Source="{Binding MyImageSource}" VerticalOptions="CenterAndExpand" IsVisible="True" Aspect="AspectFit" HorizontalOptions="FillAndExpand" />
    </StackLayout>

    <ActivityIndicator Grid.Row="0" Grid.RowSpan="2" IsRunning="{Binding IsBusy}" HorizontalOptions="Center" VerticalOptions="Center" Color="Default" />

    <StackLayout Grid.Row="1" Orientation="Vertical" Spacing="5" Padding="5" HorizontalOptions="FillAndExpand">
      <Button Text="Complete" IsEnabled="False" BackgroundColor="{x:Static mobileUi:Color.XfBlue}" TextColor="White" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand" />
    </StackLayout>

  </Grid>
</ContentPage>

Model:

    private readonly TaskScheduler _scheduler = TaskScheduler.FromCurrentSynchronizationContext();
    private IMediaPicker _mediaPicker;
    private ImageSource _imageSource;
    private Command _takePictureCommand;

    private string _status;
    public string Status
    {
        get { return _status; }
        private set { _status = value; }
    }

    ///<summary>
    ///Gets or sets the image source.
    ///</summary>
    ///<value>The image source.</value>
    public ImageSource MyImageSource
    {
        get
        {
            return _imageSource;
        }
        set
        {
            _imageSource = value;
        }
    }

    /// <summary>
    /// Setups this instance.
    /// </summary>
    private void Setup()
    {
        if (_mediaPicker != null)
        {
            return;
        }

        var device = Resolver.Resolve<IDevice>();

        ////RM: hack for working on windows phone? 
        _mediaPicker = DependencyService.Get<IMediaPicker>() ?? device.MediaPicker;
    }

    /// <summary>
    /// Takes the picture.
    /// </summary>
    /// <returns>Take Picture Task.</returns>
    private async Task<MediaFile> TakePicture()
    {
        Setup();

        MyImageSource = null;

        return await _mediaPicker.TakePhotoAsync(new CameraMediaStorageOptions { DefaultCamera = CameraDevice.Rear, PercentQuality = 100, SaveMediaOnCapture = true }).ContinueWith(t =>
        {
            if (t.IsFaulted)
            {
                Status = t.Exception.InnerException.ToString();
            }
            else if (t.IsCanceled)
            {
                Status = "Canceled";
            }
            else
            {
                var mediaFile = t.Result;

                MyImageSource = ImageSource.FromStream(() => mediaFile.Source);
                return mediaFile;
            }

            return null;
        }, _scheduler);
    }

    /// <summary>
    /// Gets the take picture command.
    /// </summary>
    /// <value>The take picture command.</value>
    public Command TakePictureCommand
    {
        get
        {
            return _takePictureCommand ?? (_takePictureCommand = new Command(
                                                                   async () => await TakePicture(),
                                                                   () => true));
        }
    }