Magento: How to get product rating and review?

Here is the code to get ratings and reviews for any particular product.

/**
 * Getting reviews collection object
 */
$productId = $product->getId();
$reviews = Mage::getModel('review/review')
				->getResourceCollection()
				->addStoreFilter(Mage::app()->getStore()->getId())
				->addEntityFilter('product', $productId)
				->addStatusFilter(Mage_Review_Model_Review::STATUS_APPROVED)
				->setDateOrder()
				->addRateVotes();
/**
 * Getting average of ratings/reviews
 */
$avg = 0;
$ratings = array();
if (count($reviews) > 0) {
	foreach ($reviews->getItems() as $review) {
		foreach( $review->getRatingVotes() as $vote ) {
			$ratings[] = $vote->getPercent();
		}
	}
	$avg = array_sum($ratings)/count($ratings);
}

Displaying the ratings

<!-- REMOVE 'IF CONDITION', TO SHOW RATING IN ALL RATED/UNRATED PRODUCTS -->
<?php if($avg): ?>
	<div class="rating-box" style="float:left;">
		<div class="rating" style="width: <?php echo ceil($avg) ; ?>%;"></div>
	</div>
<?php endif; ?>

Hope this helps. Thanks.