I use my DH's saw and it has seen some hard work over the years, his is a ryobi.
I will say that a cordless reciprocating saw, although easy to operated could be a bit hard for someone with hand problems. Mine is a bit heavy due to the weight of the battery, depending on what you are cutting the back and forth movement of the saw can a a bit strenuous and holding it at the angle that you need can be awkward. I really love mine and find it great for in the garden but if you have hand issues you should give it a try before you buy if possible. Many store will let you try a tool before you buy it and if you take it home and it doesn't work for you, you should be able to return it.
