This is an amazing price for this many eyepieces and filters. These are high quality Plossl (4 elements) eyepieces. The selection of filters is about all you will ever need. I haven't used my telescope for a while and managed to lose the eyepieces so I bought this set. These are better quality eyepieces than I originally had so it was fortuitous.Plossl eyepieces sell for around $40.00 each, and the Barlow costs about the same, so 5 eyepieces and a Barlow bought individually would cost about $240.00. Filter prices range all over the place depending on quality. The cheapest I found was a set of six filters from Orion for $120.00. Don't forget to add in the padded case for about $50.00 to arrive at $410.00. While this set offers great savings, the advertised claim that the value is over $700.00 is greatly exaggerated. However, a $280.00 saving is still a great deal.For the novice. magnification is calculated by dividing the focal length of the Mirror (reflector) or Primary lens (refractor) by the focal length of the eyepiece. For example, my telescope has a focal length of 1,000 mm (1 inch = 25.4 mm), so the 32 mm eyepiece gives me 1,000/32 = 31x. Perfect for looking at nebulae like those found in Orion. At the other extreme, the 6 mm lens gives 167x, and the Barlow doubles that to 334, good for studying Mars (If the planetwide dust storm ever settles).I recommend buying these other items to enhance your experience.1) I use a medium sized refractor for most of my observations so a diagonal prism for ease of viewing is almost essential. Reflectors don't really need diagonals because of the position of the eyepiece. The one I bought is "Meade Instruments #918A 1.25-Inch Diagonal Prism." for $29.99. Here is the link: https://amazon.com/gp/product/B0006NAS8K/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=12) A light pollution filter if you live in an area with a lot of street lights. there are some very expensive ones, but, I bought the "Gosky 1.25 Inch Light Pollution Filter for Telescope" for $19.99. Here is the link: https://amazon.com/gp/product/B01LGZNMGG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=13) Optional, 4mm eyepiece for higher magnification. Most complete sets of eyepieces have the 4 mm eyepiece, so I was surprised it was not in this set. No matter, it is still a fantastic set. I bought the "Celestron Omni Series 1-1/4 4MM Eyepiece" for $23.00. Here is the link: https://amazon.com/gp/product/B00008Y0S5/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1The case has a couple of slots cut out in the foam liner for the addition of extra pieces. Using the cutouts you can store the extra filter, eyepiece, and diagonal in the case. I removed the foam from the filter area to store the extra filter and as luck would have it, it was the perfect length to use as a spacer between the diagonal and the extra eyepiece (eyepiece hasn't arrived yet). You can always cut the foam that you remove from the large cutout area, it was just nice to have the perfect fit. As you can see from the photo (Amazon rotated it 90 degrees) it all fits nicely.This is the perfect set for casual astronomy buffs who don't want to mortgage their houses to buy astronomy equipment. Since it's Celestron, you can count on it being good quality.