I like Xenocode as well.  However, in no way is 5x worth it IMO.  I would
just obfuscate and call it a day.

Example of xenocode work(trial version 3.1.6 build 2012):
CFO is max.

before obfuscation:

   [STAThread]
   static void Main(string[] args)
   {
     System.Console.WriteLine("Please, enter number.");
     int number = Convert.ToInt32(System.Console.ReadLine());
     System.Console.WriteLine(String.Format("Factorial of {0} is {1}",
number, Calculate(number)));
     System.Console.WriteLine(String.Format("Squared {0} is {1}",
number, GetSquared(number)));
     double d = 53.0;
     System.Console.WriteLine(String.Format("Squared {0} is {1}", d,
GetSquared(d)));
     System.Console.WriteLine(String.Format("Square root of  {0} is
{1}", d, GetSquareRoot(d)));
   }

   private static int Calculate(int number)
   {
     if (number == 1)
         return 1;
     return number * Calculate(number - 1);
   }

   private static int GetSquared(int x)
   {
     return x*x;
   }

   private static double GetSquared(double x)
   {
     return x*x;
   }

   private static double GetSquareRoot(double x)
   {
     return Math.Sqrt(x);
   }
 }

after(decompiled by Salamander, RemoteSoft said that main method is
obfuscated):

       [STAThreadAttribute()]
       private static void xc447809891322395(string[]
xce8d8c7e3c2c2426)
       {
           int i;

           double d;

           Console.WriteLine("Please, enter number.");
           i = Convert.ToInt32(Console.ReadLine());
           ConstantExp: "Factorial of {0} is {1}"
           VariableExp: i
           ConstantExp: "Square root of  {0} is {1}"
           VariableExp: d
     IL_0054:  box        [mscorlib]System.Int32
           BoxingExp: xb1de1ba20faeeff8(i)
     IL_0064:  call       string
[mscorlib]System.String::Format(string, object, object)
     IL_0069:  call       void
[mscorlib]System.Console::WriteLine(string)
           Console.WriteLine(String.Format("Squared {0} is {1}", i,
x68479d4d6a6e9138(i)));
           d = 53.0;
           Console.WriteLine(String.Format("Squared {0} is {1}", d,
x68479d4d6a6e9138(d)));
     IL_008b:  box        [mscorlib]System.Double
           BoxingExp: x51c832559b7f7cb7(d)
     IL_009b:  call       string
[mscorlib]System.String::Format(string, object, object)
     IL_00a0:  call       void
[mscorlib]System.Console::WriteLine(string)
       }

       private static int xb1de1ba20faeeff8(int x78b0a0bc28459535)
       {
           if (x78b0a0bc28459535 == 1)
           {
               return 1;
           }
           else
           {
               return x78b0a0bc28459535 *
xb1de1ba20faeeff8(x78b0a0bc28459535 - 1);
           }
       }

       private static int x68479d4d6a6e9138(int x08db3aeabb253cb1)
       {
           return x08db3aeabb253cb1 * x08db3aeabb253cb1;
       }

       private static double x68479d4d6a6e9138(double
x08db3aeabb253cb1)
       {
           return x08db3aeabb253cb1 * x08db3aeabb253cb1;
       }

       private static double x51c832559b7f7cb7(double
x08db3aeabb253cb1)
       {
           return Math.Sqrt(x08db3aeabb253cb1);
       }
   }

Is there any CFO? I think no. The trash in the main method appears
because of xenocode damaged some metadata.

May be it is also restriction of trial version? If so why settings of
CFO is available?