We overall love Dyson products including their vacuums.  Unfortunately, our vacuums (going back to uprights to our current cordless sticks) just don't last as long as we think they should for the price.  We generally get about 4-5 years out of them before they start losing suction.  We do all the recommended maintenance.  We'll see with this latest one (v11), which is doing great right now.  It cleans well and is easy to use.  We have about a 50/50 of carpet and hardwood floors it performs well on both.