I can tell you from first hand. The company has a ton of nickel and dime products that are used alot in a CV lab and Interventional Radiology.
The salary for a sales rep is about $35k to 40k. Commissions are tweaked on GP. So at plan you can make about $95k. Territories are laid out strange. If you do not have some rather large cities in your territory, you will never ever make quota. Managers ride your ass.
You get mileage reimbursement. Typically whatever the IRS reimburses, Merit abides by it.
When you compare Merit to a real player such as Guidant, Bard, Medtronic, etc.... MMerit is on the low end of the scale of paying the sales reps.
Great beginner medical sales job. That is about it.