I think Bissell vacuums are OK if they're looked after and maintained well, but if you're a regular user who expects a vacuum cleaner to keep performing well without routine maintenance then they are prone to an early death.
I've had several Bissell carpet washers and a couple of uprights and found that they performed well. I had a Proheat 2X which was excellent at cleaning with it's two aggressive brushrolls, but it didn't extract as much water from the carpet as my Vax Oasis (Hoover Steamvac) or Vax Dual V. I liked the fact that it was considerably quieter than the Vax models though. My Proheat stopped spraying solution as it got clogged up inside but I managed to fix it. The Bissell shampoo tends to leave a residue inside the machine so it really should be flushed out with clean water after every use, but most people wouldn't bother, hence the common problem of the spray not functioning. The parts for Bissell cleaners seem to be widely available in the UK and reasonably priced, so if a problem did occur, I knew I would be able to fix it without spending a fortune.
I have owned a Lift off, Momentum and Easy Vac. The Easy vac was more like a toy and the filters got dirty really quickly. I think the concept of the Lift Off is a very good one, but without a decent cyclonic system the filters needed regular cleaning. The Momentum was really effective at cleaning and I enjoyed using it, but again the bagless system needed regular cleaning. What I like about Bissell uprights it their aggressive brushrolls. In the UK most brushrolls have very soft brushes these days and I prefer a stiffer brush. The Vax Mach Air for example has a much softer brushroll than the Hoover Windtunnel Air.
Bissell only has a small range in the UK compared to the States and I think they are more known here for their carpet washers. Their best selling upright is probably the Powerforce bagless which currently sells for £45 ($69) at Asda Walmart and would mainly attract consumers who want to spend as little money as possible on a vacuum cleaner and don't care who makes it as long as it picks up the dirt. Unfortunately these people tend to be the ones who don't read the instructions or bother to maintain the cleaner and wonder why it doesn't pick up as well as it did when they bought it a few weeks ago. It will get returned to the store who will just refund the money so they can buy another cheap vac that will clog up and the whole cycle will start again.
So as I said earlier, even when you're spending only £45 on a Bissell upright, it is possible for it to last two or three years at least, providing it is looked after. Obviously, the best vacuums are the ones that last even when they are not maintained correctly, but even a reliable make like Sebo or Numatic will perform better if simple regular maintenance is performed on them.