Yup, it is! I’ve only used two kinds - the Spectra and 600 Land. I personally love the Spectra because it has manual features and a timer. My photos taken with it also seem too look a lot better. Although I’m not really very experienced when it comes to taking Polaroid pictures (I’m a real n00b, to be honest). Polaroid cameras are generally user-friendly. The main problem is how expensive it is. I used to buy films in bulk on eBay, but a lot of people now use Impossible films. Benoît Pioulard, the musician, happens to take excellent Polaroid pictures and uses Impossible films as well.
For comparison, you can see my 600 Land camera + a few shots here: 1, 2, 3, 4. Here are some Spectra shots: 1, 2, 3, 4.