diff --git a/spring-binding/src/main/java/org/springframework/binding/expression/el/ELContextFactory.java b/spring-binding/src/main/java/org/springframework/binding/expression/el/ELContextFactory.java
index 731cc9fa..ab554364 100644
--- a/spring-binding/src/main/java/org/springframework/binding/expression/el/ELContextFactory.java
+++ b/spring-binding/src/main/java/org/springframework/binding/expression/el/ELContextFactory.java
@@ -15,8 +15,6 @@
  */
 package org.springframework.binding.expression.el;
 
-import java.io.Serializable;
-
 import javax.el.ELContext;
 import javax.el.ELResolver;
 
@@ -30,7 +28,7 @@ import javax.el.ELResolver;
  * @author Keith Donald
  * @author Jeremy Grelle
  */
-public interface ELContextFactory extends Serializable {
+public interface ELContextFactory {
 
 	/**
 	 * Configures and returns an {@link ELContext} to be used in evaluating EL expressions on the given base target
diff --git a/spring-binding/src/main/java/org/springframework/binding/expression/el/ELExpression.java b/spring-binding/src/main/java/org/springframework/binding/expression/el/ELExpression.java
index 67b91bc5..8299f284 100644
--- a/spring-binding/src/main/java/org/springframework/binding/expression/el/ELExpression.java
+++ b/spring-binding/src/main/java/org/springframework/binding/expression/el/ELExpression.java
@@ -51,8 +51,8 @@ public class ELExpression implements Expression {
 	public ELExpression(ELContextFactory factory, ValueExpression valueExpression, ConversionService conversionService,
 			boolean template) {
 		Assert.notNull(factory, "The ELContextFactory is required to evaluate EL expressions");
-		Assert.notNull(valueExpression, "The EL value expression is required for evaluation");
-		Assert.notNull(conversionService, "The conversion service is required");
+		Assert.notNull(valueExpression, "The EL ValueExpression is required for evaluation");
+		Assert.notNull(conversionService, "The ConversionService to perform type coersions is required");
 		this.elContextFactory = factory;
 		this.valueExpression = valueExpression;
 		this.conversionService = conversionService;
@@ -151,7 +151,6 @@ public class ELExpression implements Expression {
 	}
 
 	public String toString() {
-		return valueExpression.getExpressionString();
+		return getExpressionString();
 	}
-
 }
\ No newline at end of file
diff --git a/spring-binding/src/main/java/org/springframework/binding/expression/ognl/OgnlExpression.java b/spring-binding/src/main/java/org/springframework/binding/expression/ognl/OgnlExpression.java
index a5590500..d70afd59 100644
--- a/spring-binding/src/main/java/org/springframework/binding/expression/ognl/OgnlExpression.java
+++ b/spring-binding/src/main/java/org/springframework/binding/expression/ognl/OgnlExpression.java
@@ -84,6 +84,7 @@ class OgnlExpression implements Expression {
 	public void setValue(Object context, Object value) {
 		try {
 			Map evaluationContext = Ognl.addDefaultContext(context, getVariables(context));
+			// TODO set TypeConverter here to invoke our ConversionService
 			Ognl.setValue(expression, evaluationContext, context, value);
 		} catch (NoSuchPropertyException e) {
 			throw new PropertyNotFoundException(context.getClass(), getExpressionString(), e);
@@ -97,7 +98,7 @@ class OgnlExpression implements Expression {
 	public Class getValueType(Object context) {
 		try {
 			// OGNL has no native way to get this information
-			return new BeanWrapperImpl(context).getPropertyDescriptor(expressionString).getPropertyType();
+			return new BeanWrapperImpl(context).getPropertyType(expressionString);
 		} catch (InvalidPropertyException e) {
 			throw new PropertyNotFoundException(context.getClass(), getExpressionString(), e);
 		} catch (BeansException e) {
@@ -125,6 +126,6 @@ class OgnlExpression implements Expression {
 	}
 
 	public String toString() {
-		return expression.toString();
+		return expressionString;
 	}
 }
\ No newline at end of file