This is a replacement decision in front of you. The questions below tell you what to check and what to ask before you sign. The answers are general, and they hold for any dryer you consider.
Does the vent path decide the job?
Often it does. Measure the run from the dryer outlet to the exterior cap. Note the bends and the duct material. A long run with many bends slows drying and asks more of the blower. Ask the installer to write down the vent length and bends they expect. Rigid metal duct is the material to look for. Replace flexible foil or plastic duct if it is crushed or torn. The clothes dryer page sets out typical service life and planning dates: Clothes Dryer: typical service life and when to plan.
Does the fuel type match the hookup?
Electric and gas dryers need different connections. A gas dryer needs a gas line and a shutoff sized and placed for that model. Switching from electric to gas, or the reverse, is a bigger job than a like-for-like swap. Ask who runs the gas or electrical connection and whether a licensed person will do it. Confirm the outlet or hookup is already in place for the model you choose.
Is there room for the unit and the door?
Check the space the cabinet needs, the door swing, and the clearance behind the unit for the vent hose. Set the hose before the unit slides into place. Compare the door swing against the room. A door that cannot open fully makes loading harder.
What should I read in a warranty or service plan?
A service contract or warranty is a written agreement about what a seller or provider will do, under what conditions, for a set time. Read these lines before you accept any plan:
What it covers, and what it excludes.
The waiting period. This is the time after the plan starts before coverage applies to a claim. Ask whether a problem found in that window is covered at all.
How cancellation works, and whether any refund comes back and how it is calculated. Ask for the terms in writing.
How transfer works if you sell the home. Some plans move with the house and some end with the sale. Read the transfer clause before you assume either.
Who answers the phone when something breaks, and what proof they need from you.
Where to find the published figures
This site publishes typical service life and planning windows for each system. The ranking page sets out how the major appliances compare on typical life. Use those tables for timing questions, and use the contract itself for the terms: The major appliances, ranked by typical service life.