The 110 is an old model very strong construction not much plastic but in essence the same as the current 720, right down to the 1.25HP motor.
I have one of these at the moment and have refurbished it because its a favourite model of mine..... ( First RAS I ever had )
I had 4 Dewalt RAS in the workshop and one had to go. I sold a really good Elu 1250 rather than the 110..... My main one is a 721 (12") and another under the bench, refurbed and resting.
Not much to go wrong with any model, apart from issues brought about by neglect and misguided maintenance. By this I mean such things as using WD40 as a lubricant, which it is not, and greasing the roller head tracks, which are best dry lubed ( Graphite) or not lubed at all and just regularly wiped clean.
Grease on these tracks attracts dust and this holds dust which builds up and is compressed by sliding the head, becomes lumpy and leads to poor travel characteristics on the head and ultimately overloads the sealed bearings.. This results in jerky sloppy travel on the arm and loss of accuracy and may even cause binding of the blade and kickback.
Really this applies to all models, not just the 110. Apart from the smaller folding model meant to hang on the wall when not in use. This has a liner on the arm tracks and generally is a model to be avoided.
I have not owned a 1370, so cannot comment, but if you have any questions about the 110 I will answer if I can.
