Yes, you can easily deploy your Ethereum smart contracts to the RSK blockchain. Smart contracts for RSK can be written using Solidity and are fully compatible with Ethereum Smart Contracts, so you can migrate your existing Ethereum Smart Contract to RSK without changing the smart contract. You just need to configure your `truffle-config.js` file to point to RSK. Here's an example for the RSK Testnet:

```
javascript
testnet: {
      provider: () => new HDWalletProvider({
        mnemonic: {
          phrase: testnetSeedPhrase,
        },
        providerOrUrl: 'https://public-node.testnet.rsk.co/',
        derivationPath: "m/44'/37310'/0'/0/",
        // Higher polling interval to check for blocks less frequently
        pollingInterval: 15e3,
      }),
      // Ref: http://developers.rsk.co/rsk/architecture/account-based/#chainid
      network_id: 31,
      gasPrice: gasPriceTestnet,
      networkCheckTimeout: 1e6,
      timeoutBlocks: 100,
      // Higher polling interval to check for blocks less frequently
      // during deployment
      deploymentPollingInterval: 15e3,
    },
```

**Pros**

* RSK has lower gas fees compared to Ethereum - ~2-2.5%
* You can build and use smart contracts using the same tools/software/libraries

**Cons**

* The block time is 30 sec, which is slower than 15 sec in Ethereum 

You can find a guide [here](https://https://developers.rsk.co/tutorials/ethereum-devs/port-ethereum-dapps/) on how to port Ethereum dApp to RSK