Not really. Their usual fees for payments are not higher than any other LSP or routing node. I think you are confusing the 1st deposit (that is opening a channel) with regular routing fees. Are not the same.

I've explained in some of my guides the best practice to use this mobile node. To avoid paying the splice-in fees (that means expanding the channel size and paying onchain fees), you better make a larger initial deposit and then withdraw max 90% (if you want more inbound liquidity), but never empty that channel, otherwise they will close it.

If you make small deposits, every time you will be charged 10k sats for each splice-in. But that doesn't mean "they have high fees", is just that you didn't read the documentation and don't know how to use it properly.