Price paid: $ 550
Purchased from: local store
Sound — 9
Now that I've had this amp for more than a year, I can say that the quality of the amp modelling is much much higher than in the Spider3 15W and 30W models (which I don't like at all any more). I usually use the red metal channel and the green insane channel for rhythm/lead and green crunch for rock and red clean for pristine cleans. I can't really comment on the effects, as I rarely use them, but they are decent, though not always that versatile. Additionally the speaker has "broken in" and produces very pleasant tone, even at higher volume (in my room with Alpine hearing protection). Overall it seems to me that the Spider Jam doesn't have the Spider3 modelling but rather the Spider4 modelling, especially since it's got 12 models and not only 4 like on my old Spider3 15W. The effects models are more dated than the Spider4's, since Line6 has ceased to release updates to this amp (though I can't complain here, I haven't even updated to v2.0 of the firmware yet.
Overall Impression — 9
Playing mainly rock and metal with this amp, I'd say this amp is a good match for me. I especially love the integrated drum loops and the ease of use with those (one press on a button and you can start rocking... having an FBV Shortboard as well is especially rewarding with foot-controlled recording). I'd definitely recommend this amp to anyone who needs a useful amp for both practising and an occasional gig and would buy it again, since it's never let me down.
Reliability & Durability — 10
During the time I've had the amp, it has never let me down. I've had it in my room most of the time, but have carried it to friends a few times. I'd say I could depend on it under any circumstances and would gig with it if I could gig. With 75W, volume headroom should be enough for any gigs I'd play anyways. I'm pretty sure that this amp will be able to last many years (20 years?).
Features — 8
Most features have been described by jeff.beck before me, so I won't go through them all, just add some sidenotes to what he said: As far as connectivity goes, it's all there that you need: Guitar in, mic, aux, CD in, headphones out, line out and a connector for an FBV pedalboard. There's unfortunately no effects loop, but as I'm not much of en effects guy, I can't complain about the lack. The Aux-connector is meant for keyboards and is affected by channel volume and probably also EQ of the amp and can't be used at the same time as guitar input. The user interface is well made and easy to learn as most knobs are self-explaining anyways. After a while, most things can be achieved without looking at the LCD (i.e. when I don't wear my glasses), like setting tempo of the backing tracks. And this is where we get to the features that I like most about it: The backing tracks. There are both whole backing tracks and simpler drum loops. All of them are recorded in studio quality and offer a wide variety of things, from regular 12-bar blues to exotic ambient stuff and hardcore metal. Personally, the drum loops are where it shines most, since I love to use those either to practise stuff for my band or use my own guitar loop together with a drum loop and improvise over them. It's the main reason I bought this amp (apart from liking my older Spider3 at that time).