I find it difficult to use a non-SSD computer, everything is just too slow.
Won't be going back to a HDD based system.
Considering the 'do they last' question, there is an on-going SSD endurance test: SSD Write Endurance 25nm Vs 34nm
They are writing as fast as they can to see when they will fail.
Out of the 5 still testing, 4 have passed the manufacturer rated number of writes, most of them are rated below 200TB.
My first SSD is averaging 1TB writes per year, though I did reduce the amount of writes by moving some things to the HDD.
Even if you write 5TB a year it's rated around 40 years.
With some SSDs going to 5 year warranties, they are a safe investment.
As mentioned in the link, the failure rate isn't any worse than HDDs.