I have had this telescope for just over a year now, and I must say that I am very impressed. It is for beginners and for people with a bit more experience like me. The supplied lens (10mm, 25mm and Barlow lens) are ok, but for better quality viewing, I would recommned buying some Meade 5000 Series plossl eye-pieces, which are of very good quality, and should last you a life-time (even when you buy a newer, more expensive telescope one day!). As for a decent Barlow lens, I bought one of the best, the Televue 2X Barlow.
Now, I agree that you will only see a small disk for Jupiter with the supplied eyepieces, BUT, if you buy some decent eyepieces as I have mentioned above, you can see Jupiter and its cloud belts! You won't see very fine detail, but clear belts. I can see Saturn with its rings, but it appears smaller than Jupiter as it is further away. And as for the Moon, it is VERY bright, so a Moon-Filter is highly recommended, else your eyes will suffer!
All in all, it is a very good scope. If you want to go into it a bit more seriously, then I would recommend a scope with a larger diameter. This one is 130mm (5.1 inch). I would recommend a good 8 inch scope for more detail and serious astronomy. But you are looking at around £500.