Hi. I just wanted to share my experience after using the Marcum M1 for a day.
In the past, I would borrow a friends Vexilar FL18 but I got tired of not having one of my own. I looked at the Humminbird Ice 35, the Vexilar FL8, and Marcum M1. I decided on the M1 for the following reasons.
1. Is strange as it sounds, the little arm that holds the transducer was a big deal for me. I never liked the floating transducers
2. The unit seemed pretty straight forward to use
3. It came with a soft case.
4. I never used nor did I know anyone with a Marcum so I wanted to check it out.
My daughter used the Vexilar yesterday while I tested out the new Marcum. Both units worked as expected. The colors are a bit different on the Marcum but it was very easy to see even in the bright sun. I was only fishing in around 12 feet of water and had the gain turned to "1" I was able to mark fish and watch my jig (1/16 oz tipped with a minnow). I think the Marcum will be a good choice but will have to wait a few years to see how it holds up. After one day, I think I made a good choice for my price range. Will try to update the group as I get more time on the unit.