Hi Gavelitis,
Congratulations on your new mattress! You certainly made a good quality/value choice, and as you’re aware Flexus is a member here of the site which means I think highly of them and their products. I’m also happy that you were able to take advantage of their sales event.
Flexus certainly does have a strong warranty backing their products against manufacturing defects.
One thing I’ll mention, just for others who might casually peruse this thread, is a word of caution about equating the length of a mattress warranty and the useful comfort life of the product.
While it’s not possible to quantify how long any mattress will last for any particular person, if a mattress is well inside a suitable comfort/support range and isn’t close to the edge of being too soft when it is new and meets the minimum quality specs that are suggested in the guidelines here then it would be reasonable to expect a useful lifetime in the range of 7 - 10 years and with higher quality and more durable materials that are well above the minimum guidelines like latex or higher density memory foam or polyfoam (in the comfort layers especially) it would likely be in the higher end of the range or even longer.
It’s always more realistic to think of about 10 years as a maximum reasonable expectation for any mattress no matter what the quality or durability of the materials and then treat any additional time after that as “bonus time” because after about 10 years the limiting factor in the useful life of a mattress will often be the changing needs and preferences of the person sleeping on the mattress and even if a mattress is still in good condition after a decade … a mattress that was suitable for someone 10 years earlier may not be the best “match” any longer.
Having said that … with higher quality materials throughout a mattress and/or for people whose needs and preferences or physical condition or body type hasn’t changed much over 10 years then “bonus time” or even “extended bonus time” with higher quality/density and more durable materials like latex or higher density memory foam or polyfoam or natural fibers is much more likely than with less durable materials.
You certainly purchased a very high quality product and with good care it should give you many years of comfort.
I’ll look forward to your comments about your new mattress once you’ve had it and have been able to sleep on it for a while.
Phoenix